Faild to build Ruby "cannot compute sizeof (size_t)" on M1 MacOS 12.1

[KokubunKazuyaRio]

Help me, please!

Machine

MacBook Pro (13-inch, M1, 2020)

Version

MacOS 12.1
Homebrew 3.3.9
rbenv 1.2.0
xcode-select version 2392

Problem

I ran rbenv uninstall 2.7.4 to install readline, then ran brew install readline and rbenv install 2.7.4.
Then the following error occurred.

$rbenv install 2.7.4
Downloading ruby-2.7.4.tar.bz2...
-> https://cache.ruby-lang.org/pub/ruby/2.7/ruby-2.7.4.tar.bz2
Installing ruby-2.7.4...
ruby-build: using readline from homebrew

BUILD FAILED (macOS 12.1 using ruby-build 20211203)

Inspect or clean up the working tree at /var/folders/1n/m740_9yd73l1t15pmpmhbv6m0000gn/T/ruby-build.20211223155202.35840.EbOLfC
Results logged to /var/folders/1n/m740_9yd73l1t15pmpmhbv6m0000gn/T/ruby-build.20211223155202.35840.log

Last 10 log lines:
checking for RUBY_FUNC_NONNULL function attribute... __attribute__ ((__nonnull__(n))) x
checking for function name string predefined identifier... __func__
checking if enum over int is allowed... yes
checking whether sys_nerr is declared... yes
checking whether getenv is declared... yes
checking for size_t... yes
checking size of size_t... configure: error: in `/var/folders/1n/m740_9yd73l1t15pmpmhbv6m0000gn/T/ruby-build.20211223155202.35840.EbOLfC/ruby-2.7.4':
configure: error: cannot compute sizeof (size_t)
See `config.log' for more details
make: *** No targets specified and no makefile found.  Stop.

Tried

• Reinstalled homebrew.
• Reinstalled xcode-select.
• Run $ brew install openssl readline.
• Added export RUBY_CONFIGURE_OPTS="--with-openssl-dir=$(brew --prefix openssl@3)” to ~/.zshrc .
• Added eval "$(rbenv init - zsh)" to ~/.zshrc.

I tried running rbenv install 2.7.4 again, but the same error occurred.

Log

/var/folders/1n/m740_9yd73l1t15pmpmhbv6m0000gn/T/ruby-build.20211223173808.20403.SCzCgQ ~/Project/tecforce-server
/var/folders/1n/m740_9yd73l1t15pmpmhbv6m0000gn/T/ruby-build.20211223173808.20403.SCzCgQ/ruby-2.7.4 /var/folders/1n/m740_9yd73l1t15pmpmhbv6m0000gn/T/ruby-build.20211223173808.20403.SCzCgQ ~/Project/tecforce-server
checking for ruby... /opt/homebrew/opt/rbenv/shims/ruby
tool/config.guess already exists
tool/config.sub already exists
checking build system type... aarch64-apple-darwin21.2.0
checking host system type... aarch64-apple-darwin21.2.0
checking target system type... aarch64-apple-darwin21.2.0
checking whether the C compiler works... yes
checking for C compiler default output file name... a.out
checking for suffix of executables... 
checking whether we are cross compiling... no
checking for suffix of object files... o
checking whether we are using the GNU C compiler... yes
checking whether clang accepts -g... yes
checking for clang option to accept ISO C89... none needed
checking how to run the C preprocessor... clang -E
checking for grep that handles long lines and -e... /usr/bin/grep
checking for egrep... /usr/bin/grep -E
checking for ANSI C header files... yes
checking for sys/types.h... yes
checking for sys/stat.h... yes
checking for stdlib.h... yes
checking for string.h... yes
checking for memory.h... yes
checking for strings.h... yes
checking for inttypes.h... yes
checking for stdint.h... yes
checking for unistd.h... yes
checking minix/config.h usability... no
checking minix/config.h presence... no
checking for minix/config.h... no
checking whether it is safe to define __EXTENSIONS__... yes
checking for clang option to accept ISO C99... none needed
checking for clang++... clang++
checking whether we are using the GNU C++ compiler... yes
checking whether clang++ accepts -g... yes
checking if minimum required OS X version is supported... yes
checking whether we are using the GNU C++ compiler... (cached) yes
checking whether clang++ accepts -g... (cached) yes
checking whether clang needs -traditional... no
checking for ld... ld
checking whether the linker is GNU ld... no
checking whether clang -E accepts -o... yes
checking for clang... /usr/bin/clang
checking for real target cpu... arm64
checking arch option... -m64
checking for clang-ranlib... (cached) :
checking for clang-ar... (cached) libtool -static
checking for libtool -static flags... (cached) -no_warning_for_no_symbols -o
checking for as... as
checking for objdump... objdump
checking for objcopy... no
checking for gobjcopy... no
checking for clang-nm... no
checking for nm... nm
checking whether ln -s works... yes
checking whether make sets $(MAKE)... yes
checking for a BSD-compatible install... /usr/bin/install -c
checking for a thread-safe mkdir -p...  -d
use 'mkdir -p' as MKDIR_P
checking for dtrace... dtrace
checking for dot... no
checking for doxygen... no
checking for pkg-config... pkg-config
checking for cd using physical directory... cd -P
checking whether CFLAGS is valid... yes
checking whether LDFLAGS is valid... yes
checking whether -Wl,-R. is accepted as LDFLAGS... no
checking whether -Wl,-rpath,. is accepted as LDFLAGS... yes
checking whether -Wdeprecated-declarations is accepted as CFLAGS... yes
checking whether -Wdivision-by-zero is accepted as CFLAGS... yes
checking whether -Wduplicated-cond is accepted as CFLAGS... no
checking whether -Wimplicit-function-declaration is accepted as CFLAGS... yes
checking whether -Wimplicit-int is accepted as CFLAGS... yes
checking whether -Wmisleading-indentation is accepted as CFLAGS... yes
checking whether -Wpointer-arith is accepted as CFLAGS... yes
checking whether -Wshorten-64-to-32 is accepted as CFLAGS... yes
checking whether -Wwrite-strings is accepted as CFLAGS... yes
checking whether -Wimplicit-fallthrough=0 is accepted as CFLAGS... no
checking whether -Wmissing-noreturn is accepted as CFLAGS... yes
checking whether -Wno-cast-function-type is accepted as CFLAGS... no
checking whether -Wno-constant-logical-operand is accepted as CFLAGS... yes
checking whether -Wno-long-long is accepted as CFLAGS... yes
checking whether -Wno-missing-field-initializers is accepted as CFLAGS... yes
checking whether -Wno-overlength-strings is accepted as CFLAGS... yes
checking whether -Wno-packed-bitfield-compat is accepted as CFLAGS... no
checking whether -Wno-parentheses-equality is accepted as CFLAGS... yes
checking whether -Wno-self-assign is accepted as CFLAGS... yes
checking whether -Wno-tautological-compare is accepted as CFLAGS... yes
checking whether -Wno-unused-parameter is accepted as CFLAGS... yes
checking whether -Wno-unused-value is accepted as CFLAGS... yes
checking whether -Wsuggest-attribute=format is accepted as CFLAGS... no
checking whether -Wsuggest-attribute=noreturn is accepted as CFLAGS... no
checking whether -Wunused-variable is accepted as CFLAGS... yes
checking whether -diag-disable=175,188,1684,2259,2312 is accepted as CFLAGS... no
checking whether -Wextra-tokens is accepted as CFLAGS... yes
checking whether -Wall -Wextra is accepted as CFLAGS... yes
checking whether -Qunused-arguments is accepted as CFLAGS... yes
checking whether -D_FORTIFY_SOURCE=2 is accepted as CFLAGS... yes
checking whether -fstack-protector-strong is accepted as CFLAGS... yes
checking whether -fstack-protector-strong is accepted as LDFLAGS... yes
checking whether -Wl,--compress-debug-sections=zlib is accepted as LDFLAGS... no
checking whether -std=gnu99 is accepted as CFLAGS... yes
checking whether -fno-strict-overflow is accepted as CFLAGS... yes
checking whether -ggdb3 is accepted as CFLAGS... yes
checking whether -fvisibility=hidden is accepted as CFLAGS... yes
checking whether -fno-fast-math is accepted as CFLAGS... yes
checking whether -fexcess-precision=standard is accepted as CFLAGS... no
checking whether -fp-model precise is accepted as CFLAGS... no
checking whether compiler has statement and declarations in expressions... yes
checking whether syscall(2) is deprecated... yes
checking for broken crypt with 8bit chars... yes
checking for codesign... codesign
checking for dsymutil... dsymutil
checking for crt_externs.h... yes
checking for crypt in -lcrypt... (cached) no
checking for dlopen in -ldl... yes
checking for shl_load in -ldld... no
checking for shutdown in -lsocket... no
checking for dirent.h that defines DIR... yes
checking for library containing opendir... none required
checking for stdbool.h that conforms to C99... yes
checking for _Bool... yes
checking for sys/wait.h that is POSIX.1 compatible... yes
checking a.out.h usability... no
checking a.out.h presence... no
checking for a.out.h... no
checking atomic.h usability... no
checking atomic.h presence... no
checking for atomic.h... no
checking copyfile.h usability... yes
checking copyfile.h presence... yes
checking for copyfile.h... yes
checking direct.h usability... no
checking direct.h presence... no
checking for direct.h... no
checking grp.h usability... yes
checking grp.h presence... yes
checking for grp.h... yes
checking fcntl.h usability... yes
checking fcntl.h presence... yes
checking for fcntl.h... yes
checking float.h usability... yes
checking float.h presence... yes
checking for float.h... yes
checking ieeefp.h usability... no
checking ieeefp.h presence... no
checking for ieeefp.h... no
checking intrinsics.h usability... no
checking intrinsics.h presence... no
checking for intrinsics.h... no
checking langinfo.h usability... yes
checking langinfo.h presence... yes
checking for langinfo.h... yes
checking limits.h usability... yes
checking limits.h presence... yes
checking for limits.h... yes
checking locale.h usability... yes
checking locale.h presence... yes
checking for locale.h... yes
checking malloc.h usability... no
checking malloc.h presence... no
checking for malloc.h... no
checking malloc/malloc.h usability... yes
checking malloc/malloc.h presence... yes
checking for malloc/malloc.h... yes
checking malloc_np.h usability... no
checking malloc_np.h presence... no
checking for malloc_np.h... no
checking net/socket.h usability... no
checking net/socket.h presence... no
checking for net/socket.h... no
checking process.h usability... no
checking process.h presence... no
checking for process.h... no
checking pwd.h usability... yes
checking pwd.h presence... yes
checking for pwd.h... yes
checking sanitizer/asan_interface.h usability... yes
checking sanitizer/asan_interface.h presence... yes
checking for sanitizer/asan_interface.h... yes
checking sanitizer/msan_interface.h usability... yes
checking sanitizer/msan_interface.h presence... yes
checking for sanitizer/msan_interface.h... yes
checking setjmpex.h usability... no
checking setjmpex.h presence... no
checking for setjmpex.h... no
checking stdalign.h usability... yes
checking stdalign.h presence... yes
checking for stdalign.h... yes
checking sys/attr.h usability... yes
checking sys/attr.h presence... yes
checking for sys/attr.h... yes
checking sys/eventfd.h usability... no
checking sys/eventfd.h presence... no
checking for sys/eventfd.h... no
checking sys/fcntl.h usability... yes
checking sys/fcntl.h presence... yes
checking for sys/fcntl.h... yes
checking sys/file.h usability... yes
checking sys/file.h presence... yes
checking for sys/file.h... yes
checking sys/id.h usability... no
checking sys/id.h presence... no
checking for sys/id.h... no
checking sys/ioctl.h usability... yes
checking sys/ioctl.h presence... yes
checking for sys/ioctl.h... yes
checking sys/mkdev.h usability... no
checking sys/mkdev.h presence... no
checking for sys/mkdev.h... no
checking sys/param.h usability... yes
checking sys/param.h presence... yes
checking for sys/param.h... yes
checking sys/prctl.h usability... no
checking sys/prctl.h presence... no
checking for sys/prctl.h... no
checking sys/resource.h usability... yes
checking sys/resource.h presence... yes
checking for sys/resource.h... yes
checking sys/select.h usability... yes
checking sys/select.h presence... yes
checking for sys/select.h... yes
checking sys/sendfile.h usability... no
checking sys/sendfile.h presence... no
checking for sys/sendfile.h... no
checking sys/socket.h usability... yes
checking sys/socket.h presence... yes
checking for sys/socket.h... yes
checking for sys/syscall.h... (cached) no
checking sys/sysmacros.h usability... no
checking sys/sysmacros.h presence... no
checking for sys/sysmacros.h... no
checking sys/time.h usability... yes
checking sys/time.h presence... yes
checking for sys/time.h... yes
checking sys/times.h usability... yes
checking sys/times.h presence... yes
checking for sys/times.h... yes
checking sys/uio.h usability... yes
checking sys/uio.h presence... yes
checking for sys/uio.h... yes
checking sys/utime.h usability... no
checking sys/utime.h presence... no
checking for sys/utime.h... no
checking for syscall.h... (cached) no
checking time.h usability... yes
checking time.h presence... yes
checking for time.h... yes
checking ucontext.h usability... yes
checking ucontext.h presence... yes
checking for ucontext.h... yes
checking utime.h usability... yes
checking utime.h presence... yes
checking for utime.h... yes
checking gmp.h usability... no
checking gmp.h presence... no
checking for gmp.h... no
checking for special C compiler options needed for large files... no
checking for _FILE_OFFSET_BITS value needed for large files... no
checking whether byte ordering is bigendian... no
checking for an ANSI C-conforming const... yes
checking whether char is unsigned... no
checking for inline... inline
checking for working volatile... yes
checking for typeof syntax and keyword spelling... typeof
checking for C/C++ restrict keyword... __restrict
checking for long long... yes
checking for off_t... yes
checking char bit... 8
checking size of int... 0
checking size of short... 0
checking size of long... 0
checking size of long long... 8
checking size of __int64... 0
checking size of __int128... 16
checking size of off_t... 8
checking size of void*... 8
checking size of float... 4
checking size of double... 8
checking size of time_t... 8
checking size of clock_t... 8
checking packed struct attribute... x __attribute__((packed))
checking whether -Wno-address-of-packed-member is accepted as CFLAGS... yes
checking for printf prefix for long long... ll
checking for pid_t... yes
checking for convertible type of pid_t... INT
checking for uid_t... yes
checking for convertible type of uid_t... UINT
checking for gid_t... yes
checking for convertible type of gid_t... UINT
checking for time_t... yes
checking for convertible type of time_t... LONG
checking for dev_t... yes
checking for convertible type of dev_t... INT
checking for mode_t... yes
checking for convertible type of mode_t... USHORT
checking for rlim_t... yes
checking for convertible type of rlim_t... ULL
checking for off_t... (cached) yes
checking for convertible type of off_t... LL
checking for clockid_t... yes
checking for convertible type of clockid_t... UINT
checking for prototypes... yes
checking token paste string... ansi
checking stringization... #expr
checking string literal concatenation... yes
checking for variable length prototypes and stdarg.h... yes
checking for variable length macro... yes
checking for alignas() syntax... __attribute__((__aligned__(x)))
checking for alignof() syntax... alignof
checking for CONSTFUNC function attribute... __attribute__ ((__const__)) x
checking for PUREFUNC function attribute... __attribute__ ((__pure__)) x
checking for NORETURN function attribute... __attribute__ ((__noreturn__)) x
checking for DEPRECATED function attribute... __attribute__ ((__deprecated__)) x
checking for DEPRECATED_BY function attribute... __attribute__ ((__deprecated__("by "#n))) x
checking for DEPRECATED_TYPE type attribute... x __attribute__ ((__deprecated__ mesg))
checking for NOINLINE function attribute... __attribute__ ((__noinline__)) x
checking for ALWAYS_INLINE function attribute... __attribute__ ((__always_inline__)) x
checking for NO_SANITIZE function attribute... __attribute__ ((__no_sanitize__(san))) x
checking for NO_SANITIZE_ADDRESS function attribute... __attribute__ ((__no_sanitize_address__)) x
checking for NO_ADDRESS_SAFETY_ANALYSIS function attribute... __attribute__ ((__no_address_safety_analysis__)) x
checking for WARN_UNUSED_RESULT function attribute... __attribute__ ((__warn_unused_result__)) x
checking for MAYBE_UNUSED function attribute... __attribute__ ((__unused__)) x
checking for ERRORFUNC function attribute... x
checking for WARNINGFUNC function attribute... x
checking for WEAK function attribute... __attribute__ ((__weak__)) x
checking for __attribute__((__depreacted__(msg))) in C++... yes
checking for FUNC_STDCALL function attribute... x
checking for FUNC_CDECL function attribute... __attribute__ ((__cdecl__)) x
checking for FUNC_FASTCALL function attribute... x
checking for FUNC_UNOPTIMIZED function attribute... x
checking for FUNC_MINIMIZED function attribute... x
checking for function alias... no
checking for __atomic builtins... yes
checking for __sync builtins... yes
checking for __builtin_unreachable... yes
checking for exported function attribute... __attribute__ ((__visibility__("default")))
checking for RUBY_FUNC_NONNULL function attribute... __attribute__ ((__nonnull__(n))) x
checking for function name string predefined identifier... __func__
checking if enum over int is allowed... yes
checking whether sys_nerr is declared... yes
checking whether getenv is declared... yes
checking for size_t... yes
checking size of size_t... configure: error: in `/var/folders/1n/m740_9yd73l1t15pmpmhbv6m0000gn/T/ruby-build.20211223173808.20403.SCzCgQ/ruby-2.7.4':
configure: error: cannot compute sizeof (size_t)
See `config.log' for more details
make: *** No targets specified and no makefile found.  Stop.

[khannotations]

Also struggling with this (for ruby 3.0.2) - wondering if anyone has a solution?

[marcelodeaguiar]

Any updates on this? I'm having the same problem

[vidishaweddy]

I am having this issue with this on M1x macbook on monterey, reinstalling xcode-select doesn't help and using brew gcc, libffi, or openssl doesn't help too. It's pretty frustrating at this point because I can't really downgrade. Hopefully someone can help

[DakotaMichael]

I have this issue rn. LOGS:

rbenv install --verbose 2.7.6 /var/folders/s6/sbwnsgtn6jd2l711mpq_hlr40000gn/T/ruby-build.20220428123510.10449.KS7FzM ~ Downloading ruby-2.7.6.tar.bz2... -> https://cache.ruby-lang.org/pub/ruby/2.7/ruby-2.7.6.tar.bz2 /var/folders/s6/sbwnsgtn6jd2l711mpq_hlr40000gn/T/ruby-build.20220428123510.10449.KS7FzM/ruby-2.7.6 /var/folders/s6/sbwnsgtn6jd2l711mpq_hlr40000gn/T/ruby-build.20220428123510.10449.KS7FzM ~ Installing ruby-2.7.6... ruby-build: using readline from homebrew checking for ruby... /usr/bin/ruby tool/config.guess already exists tool/config.sub already exists checking build system type... aarch64-apple-darwin21.4.0 checking host system type... aarch64-apple-darwin21.4.0 checking target system type... aarch64-apple-darwin21.4.0 checking whether the C compiler works... yes checking for C compiler default output file name... a.out checking for suffix of executables... checking whether we are cross compiling... no checking for suffix of object files... o checking whether we are using the GNU C compiler... yes checking whether clang accepts -g... yes checking for clang option to accept ISO C89... none needed checking how to run the C preprocessor... clang -E checking for grep that handles long lines and -e... /usr/bin/grep checking for egrep... /usr/bin/grep -E checking for ANSI C header files... yes checking for sys/types.h... yes checking for sys/stat.h... yes checking for stdlib.h... yes checking for string.h... yes checking for memory.h... yes checking for strings.h... yes checking for inttypes.h... yes checking for stdint.h... yes checking for unistd.h... yes checking minix/config.h usability... no checking minix/config.h presence... no checking for minix/config.h... no checking whether it is safe to define __EXTENSIONS__... yes checking for clang option to accept ISO C99... none needed checking for clang++... clang++ checking whether we are using the GNU C++ compiler... yes checking whether clang++ accepts -g... yes checking if minimum required OS X version is supported... yes checking whether we are using the GNU C++ compiler... (cached) yes checking whether clang++ accepts -g... (cached) yes checking whether clang needs -traditional... no checking for ld... ld checking whether the linker is GNU ld... no checking whether clang -E accepts -o... yes checking for clang... /usr/bin/clang checking for real target cpu... arm64 checking arch option... -m64 checking for clang-ranlib... (cached) : checking for clang-ar... (cached) libtool -static checking for libtool -static flags... (cached) -no_warning_for_no_symbols -o checking for as... as checking for objdump... objdump checking for objcopy... no checking for gobjcopy... no checking for clang-nm... no checking for nm... nm checking whether ln -s works... yes checking whether make sets $(MAKE)... yes checking for a BSD-compatible install... /usr/bin/install -c checking for a thread-safe mkdir -p... -d use 'mkdir -p' as MKDIR_P checking for dtrace... dtrace checking for dot... no checking for doxygen... no checking for pkg-config... no checking for cd using physical directory... cd -P checking whether CFLAGS is valid... yes checking whether LDFLAGS is valid... yes checking whether -Wl,-R. is accepted as LDFLAGS... no checking whether -Wl,-rpath,. is accepted as LDFLAGS... yes checking whether -Wdeprecated-declarations is accepted as CFLAGS... yes checking whether -Wdivision-by-zero is accepted as CFLAGS... yes checking whether -Wduplicated-cond is accepted as CFLAGS... no checking whether -Wimplicit-function-declaration is accepted as CFLAGS... yes checking whether -Wimplicit-int is accepted as CFLAGS... yes checking whether -Wmisleading-indentation is accepted as CFLAGS... yes checking whether -Wpointer-arith is accepted as CFLAGS... yes checking whether -Wshorten-64-to-32 is accepted as CFLAGS... yes checking whether -Wwrite-strings is accepted as CFLAGS... yes checking whether -Wimplicit-fallthrough=0 is accepted as CFLAGS... no checking whether -Wmissing-noreturn is accepted as CFLAGS... yes checking whether -Wno-cast-function-type is accepted as CFLAGS... yes checking whether -Wno-constant-logical-operand is accepted as CFLAGS... yes checking whether -Wno-long-long is accepted as CFLAGS... yes checking whether -Wno-missing-field-initializers is accepted as CFLAGS... yes checking whether -Wno-overlength-strings is accepted as CFLAGS... yes checking whether -Wno-packed-bitfield-compat is accepted as CFLAGS... no checking whether -Wno-parentheses-equality is accepted as CFLAGS... yes checking whether -Wno-self-assign is accepted as CFLAGS... yes checking whether -Wno-tautological-compare is accepted as CFLAGS... yes checking whether -Wno-unused-parameter is accepted as CFLAGS... yes checking whether -Wno-unused-value is accepted as CFLAGS... yes checking whether -Wsuggest-attribute=format is accepted as CFLAGS... no checking whether -Wsuggest-attribute=noreturn is accepted as CFLAGS... no checking whether -Wunused-variable is accepted as CFLAGS... yes checking whether -diag-disable=175,188,1684,2259,2312 is accepted as CFLAGS... no checking whether -Wextra-tokens is accepted as CFLAGS... yes checking whether -Wall -Wextra is accepted as CFLAGS... yes checking whether -Qunused-arguments is accepted as CFLAGS... yes checking whether -D_FORTIFY_SOURCE=2 is accepted as CFLAGS... yes checking whether -fstack-protector-strong is accepted as CFLAGS... yes checking whether -fstack-protector-strong is accepted as LDFLAGS... yes checking whether -Wl,--compress-debug-sections=zlib is accepted as LDFLAGS... no checking whether -std=gnu99 is accepted as CFLAGS... yes checking whether -fno-strict-overflow is accepted as CFLAGS... yes checking whether -ggdb3 is accepted as CFLAGS... yes checking whether -fvisibility=hidden is accepted as CFLAGS... yes checking whether -fno-fast-math is accepted as CFLAGS... yes checking whether -fexcess-precision=standard is accepted as CFLAGS... no checking whether -fp-model precise is accepted as CFLAGS... no checking whether compiler has statement and declarations in expressions... yes checking whether syscall(2) is deprecated... yes checking for broken crypt with 8bit chars... yes checking for codesign... codesign checking for dsymutil... dsymutil checking for crt_externs.h... yes checking for crypt in -lcrypt... (cached) no checking for dlopen in -ldl... yes checking for shl_load in -ldld... no checking for shutdown in -lsocket... no checking for dirent.h that defines DIR... yes checking for library containing opendir... none required checking for stdbool.h that conforms to C99... yes checking for _Bool... yes checking for sys/wait.h that is POSIX.1 compatible... yes checking a.out.h usability... no checking a.out.h presence... no checking for a.out.h... no checking atomic.h usability... no checking atomic.h presence... no checking for atomic.h... no checking copyfile.h usability... yes checking copyfile.h presence... yes checking for copyfile.h... yes checking direct.h usability... no checking direct.h presence... no checking for direct.h... no checking grp.h usability... yes checking grp.h presence... yes checking for grp.h... yes checking fcntl.h usability... yes checking fcntl.h presence... yes checking for fcntl.h... yes checking float.h usability... yes checking float.h presence... yes checking for float.h... yes checking ieeefp.h usability... no checking ieeefp.h presence... no checking for ieeefp.h... no checking intrinsics.h usability... no checking intrinsics.h presence... no checking for intrinsics.h... no checking langinfo.h usability... yes checking langinfo.h presence... yes checking for langinfo.h... yes checking limits.h usability... yes checking limits.h presence... yes checking for limits.h... yes checking locale.h usability... yes checking locale.h presence... yes checking for locale.h... yes checking malloc.h usability... no checking malloc.h presence... no checking for malloc.h... no checking malloc/malloc.h usability... yes checking malloc/malloc.h presence... yes checking for malloc/malloc.h... yes checking malloc_np.h usability... no checking malloc_np.h presence... no checking for malloc_np.h... no checking net/socket.h usability... no checking net/socket.h presence... no checking for net/socket.h... no checking process.h usability... no checking process.h presence... no checking for process.h... no checking pwd.h usability... yes checking pwd.h presence... yes checking for pwd.h... yes checking sanitizer/asan_interface.h usability... yes checking sanitizer/asan_interface.h presence... yes checking for sanitizer/asan_interface.h... yes checking sanitizer/msan_interface.h usability... yes checking sanitizer/msan_interface.h presence... yes checking for sanitizer/msan_interface.h... yes checking setjmpex.h usability... no checking setjmpex.h presence... no checking for setjmpex.h... no checking stdalign.h usability... yes checking stdalign.h presence... yes checking for stdalign.h... yes checking sys/attr.h usability... yes checking sys/attr.h presence... yes checking for sys/attr.h... yes checking sys/eventfd.h usability... no checking sys/eventfd.h presence... no checking for sys/eventfd.h... no checking sys/fcntl.h usability... yes checking sys/fcntl.h presence... yes checking for sys/fcntl.h... yes checking sys/file.h usability... yes checking sys/file.h presence... yes checking for sys/file.h... yes checking sys/id.h usability... no checking sys/id.h presence... no checking for sys/id.h... no checking sys/ioctl.h usability... yes checking sys/ioctl.h presence... yes checking for sys/ioctl.h... yes checking sys/mkdev.h usability... no checking sys/mkdev.h presence... no checking for sys/mkdev.h... no checking sys/param.h usability... yes checking sys/param.h presence... yes checking for sys/param.h... yes checking sys/prctl.h usability... no checking sys/prctl.h presence... no checking for sys/prctl.h... no checking sys/resource.h usability... yes checking sys/resource.h presence... yes checking for sys/resource.h... yes checking sys/select.h usability... yes checking sys/select.h presence... yes checking for sys/select.h... yes checking sys/sendfile.h usability... no checking sys/sendfile.h presence... no checking for sys/sendfile.h... no checking sys/socket.h usability... yes checking sys/socket.h presence... yes checking for sys/socket.h... yes checking for sys/syscall.h... (cached) no checking sys/sysmacros.h usability... no checking sys/sysmacros.h presence... no checking for sys/sysmacros.h... no checking sys/time.h usability... yes checking sys/time.h presence... yes checking for sys/time.h... yes checking sys/times.h usability... yes checking sys/times.h presence... yes checking for sys/times.h... yes checking sys/uio.h usability... yes checking sys/uio.h presence... yes checking for sys/uio.h... yes checking sys/utime.h usability... no checking sys/utime.h presence... no checking for sys/utime.h... no checking for syscall.h... (cached) no checking time.h usability... yes checking time.h presence... yes checking for time.h... yes checking ucontext.h usability... yes checking ucontext.h presence... yes checking for ucontext.h... yes checking utime.h usability... yes checking utime.h presence... yes checking for utime.h... yes checking gmp.h usability... no checking gmp.h presence... no checking for gmp.h... no checking for special C compiler options needed for large files... no checking for _FILE_OFFSET_BITS value needed for large files... no checking whether byte ordering is bigendian... no checking for an ANSI C-conforming const... yes checking whether char is unsigned... no checking for inline... inline checking for working volatile... yes checking for typeof syntax and keyword spelling... typeof checking for C/C++ restrict keyword... __restrict checking for long long... yes checking for off_t... yes checking char bit... 8 checking size of int... 0 checking size of short... 0 checking size of long... 0 checking size of long long... 8 checking size of __int64... 0 checking size of __int128... 16 checking size of off_t... 8 checking size of void*... 8 checking size of float... 4 checking size of double... 8 checking size of time_t... 8 checking size of clock_t... 8 checking packed struct attribute... x __attribute__((packed)) checking whether -Wno-address-of-packed-member is accepted as CFLAGS... yes checking for printf prefix for long long... ll checking for pid_t... yes checking for convertible type of pid_t... INT checking for uid_t... yes checking for convertible type of uid_t... UINT checking for gid_t... yes checking for convertible type of gid_t... UINT checking for time_t... yes checking for convertible type of time_t... LONG checking for dev_t... yes checking for convertible type of dev_t... INT checking for mode_t... yes checking for convertible type of mode_t... USHORT checking for rlim_t... yes checking for convertible type of rlim_t... ULL checking for off_t... (cached) yes checking for convertible type of off_t... LL checking for clockid_t... yes checking for convertible type of clockid_t... UINT checking for prototypes... yes checking token paste string... ansi checking stringization... #expr checking string literal concatenation... yes checking for variable length prototypes and stdarg.h... yes checking for variable length macro... yes checking for alignas() syntax... __attribute__((__aligned__(x))) checking for alignof() syntax... alignof checking for CONSTFUNC function attribute... __attribute__ ((__const__)) x checking for PUREFUNC function attribute... __attribute__ ((__pure__)) x checking for NORETURN function attribute... __attribute__ ((__noreturn__)) x checking for DEPRECATED function attribute... __attribute__ ((__deprecated__)) x checking for DEPRECATED_BY function attribute... __attribute__ ((__deprecated__("by "#n))) x checking for DEPRECATED_TYPE type attribute... x __attribute__ ((__deprecated__ mesg)) checking for NOINLINE function attribute... __attribute__ ((__noinline__)) x checking for ALWAYS_INLINE function attribute... __attribute__ ((__always_inline__)) x checking for NO_SANITIZE function attribute... __attribute__ ((__no_sanitize__(san))) x checking for NO_SANITIZE_ADDRESS function attribute... __attribute__ ((__no_sanitize_address__)) x checking for NO_ADDRESS_SAFETY_ANALYSIS function attribute... __attribute__ ((__no_address_safety_analysis__)) x checking for WARN_UNUSED_RESULT function attribute... __attribute__ ((__warn_unused_result__)) x checking for MAYBE_UNUSED function attribute... __attribute__ ((__unused__)) x checking for ERRORFUNC function attribute... x checking for WARNINGFUNC function attribute... x checking for WEAK function attribute... __attribute__ ((__weak__)) x checking for __attribute__((__depreacted__(msg))) in C++... yes checking for FUNC_STDCALL function attribute... x checking for FUNC_CDECL function attribute... __attribute__ ((__cdecl__)) x checking for FUNC_FASTCALL function attribute... x checking for FUNC_UNOPTIMIZED function attribute... x checking for FUNC_MINIMIZED function attribute... x checking for function alias... no checking for __atomic builtins... yes checking for __sync builtins... yes checking for __builtin_unreachable... yes checking for exported function attribute... __attribute__ ((__visibility__("default"))) checking for RUBY_FUNC_NONNULL function attribute... __attribute__ ((__nonnull__(n))) x checking for function name string predefined identifier... __func__ checking if enum over int is allowed... yes checking whether sys_nerr is declared... yes checking whether getenv is declared... yes checking for size_t... yes checking size of size_t... configure: error: in /var/folders/s6/sbwnsgtn6jd2l711mpq_hlr40000gn/T/ruby-build.20220428123510.10449.KS7FzM/ruby-2.7.6':
configure: error: cannot compute sizeof (size_t)
See `config.log' for more details
make: *** No targets specified and no makefile found. Stop.

BUILD FAILED (macOS 12.3.1 using ruby-build 20220426)

Inspect or clean up the working tree at /var/folders/s6/sbwnsgtn6jd2l711mpq_hlr40000gn/T/ruby-build.20220428123510.10449.KS7FzM
Results logged to /var/folders/s6/sbwnsgtn6jd2l711mpq_hlr40000gn/T/ruby-build.20220428123510.10449.log

Last 10 log lines:
checking for RUBY_FUNC_NONNULL function attribute... attribute ((nonnull(n))) x
checking for function name string predefined identifier... func
checking if enum over int is allowed... yes
checking whether sys_nerr is declared... yes
checking whether getenv is declared... yes
checking for size_t... yes
checking size of size_t... configure: error: in /var/folders/s6/sbwnsgtn6jd2l711mpq_hlr40000gn/T/ruby-build.20220428123510.10449.KS7FzM/ruby-2.7.6': configure: error: cannot compute sizeof (size_t) See config.log' for more details
make: *** No targets specified and no makefile found. Stop.`

[kassiansun]

Encountered a similar issue, tried to use the system bundled clang and it works then (I was using homebrew's llvm)