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Restructure and tidy configure.ac
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@real-or-random
real-or-random committed Jan 8, 2021
1 parent 252c19d commit 47802a4
Showing 1 changed file with 96 additions and 74 deletions.
170 changes: 96 additions & 74 deletions configure.ac
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Expand Up @@ -14,7 +14,7 @@ AM_INIT_AUTOMAKE([foreign subdir-objects])
: ${CFLAGS="-g"}
LT_INIT

dnl make the compilation flags quiet unless V=1 is used
# Make the compilation flags quiet unless V=1 is used.
m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])

PKG_PROG_PKG_CONFIG
Expand All @@ -37,9 +37,9 @@ case $host_os in
if test x$cross_compiling != xyes; then
AC_PATH_PROG([BREW],brew,)
if test x$BREW != x; then
dnl These Homebrew packages may be keg-only, meaning that they won't be found
dnl in expected paths because they may conflict with system files. Ask
dnl Homebrew where each one is located, then adjust paths accordingly.
# These Homebrew packages may be keg-only, meaning that they won't be found
# in expected paths because they may conflict with system files. Ask
# Homebrew where each one is located, then adjust paths accordingly.
openssl_prefix=`$BREW --prefix openssl 2>/dev/null`
gmp_prefix=`$BREW --prefix gmp 2>/dev/null`
valgrind_prefix=`$BREW --prefix valgrind 2>/dev/null`
Expand All @@ -57,8 +57,8 @@ case $host_os in
fi
else
AC_PATH_PROG([PORT],port,)
dnl if homebrew isn't installed and macports is, add the macports default paths
dnl as a last resort.
# If homebrew isn't installed and macports is, add the macports default paths
# as a last resort.
if test x$PORT != x; then
CPPFLAGS="$CPPFLAGS -isystem /opt/local/include"
LDFLAGS="$LDFLAGS -L/opt/local/lib"
Expand Down Expand Up @@ -89,6 +89,10 @@ AC_COMPILE_IFELSE([AC_LANG_SOURCE([[char foo;]])],
CFLAGS="$saved_CFLAGS"
])

###
### Define config arguments
###

AC_ARG_ENABLE(benchmark,
AS_HELP_STRING([--enable-benchmark],[compile benchmark [default=yes]]),
[use_benchmark=$enableval],
Expand Down Expand Up @@ -149,8 +153,8 @@ AC_ARG_ENABLE(external_default_callbacks,
[use_external_default_callbacks=$enableval],
[use_external_default_callbacks=no])

dnl Test-only override of the (autodetected by the C code) "widemul" setting.
dnl Legal values are int64 (for [u]int64_t), int128 (for [unsigned] __int128), and auto (the default).
# Test-only override of the (autodetected by the C code) "widemul" setting.
# Legal values are int64 (for [u]int64_t), int128 (for [unsigned] __int128), and auto (the default).
AC_ARG_WITH([test-override-wide-multiply], [] ,[set_widemul=$withval], [set_widemul=auto])

AC_ARG_WITH([bignum], [AS_HELP_STRING([--with-bignum=gmp|no|auto],
Expand Down Expand Up @@ -180,6 +184,10 @@ AC_ARG_WITH([valgrind], [AS_HELP_STRING([--with-valgrind=yes|no|auto],
)],
[req_valgrind=$withval], [req_valgrind=auto])

###
### Handle config options (except for modules)
###

if test x"$req_valgrind" = x"no"; then
enable_valgrind=no
else
Expand All @@ -203,61 +211,6 @@ else
CFLAGS="-O2 $CFLAGS"
fi

if test x"$use_ecmult_static_precomputation" != x"no"; then
# Temporarily switch to an environment for the native compiler
save_cross_compiling=$cross_compiling
cross_compiling=no
SAVE_CC="$CC"
CC="$CC_FOR_BUILD"
SAVE_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS_FOR_BUILD"
SAVE_CPPFLAGS="$CPPFLAGS"
CPPFLAGS="$CPPFLAGS_FOR_BUILD"
SAVE_LDFLAGS="$LDFLAGS"
LDFLAGS="$LDFLAGS_FOR_BUILD"

warn_CFLAGS_FOR_BUILD="-Wall -Wextra -Wno-unused-function"
saved_CFLAGS="$CFLAGS"
CFLAGS="$warn_CFLAGS_FOR_BUILD $CFLAGS"
AC_MSG_CHECKING([if native ${CC_FOR_BUILD} supports ${warn_CFLAGS_FOR_BUILD}])
AC_COMPILE_IFELSE([AC_LANG_SOURCE([[char foo;]])],
[ AC_MSG_RESULT([yes]) ],
[ AC_MSG_RESULT([no])
CFLAGS="$saved_CFLAGS"
])

AC_MSG_CHECKING([for working native compiler: ${CC_FOR_BUILD}])
AC_RUN_IFELSE(
[AC_LANG_PROGRAM([], [])],
[working_native_cc=yes],
[working_native_cc=no],[:])

CFLAGS_FOR_BUILD="$CFLAGS"

# Restore the environment
cross_compiling=$save_cross_compiling
CC="$SAVE_CC"
CFLAGS="$SAVE_CFLAGS"
CPPFLAGS="$SAVE_CPPFLAGS"
LDFLAGS="$SAVE_LDFLAGS"

if test x"$working_native_cc" = x"no"; then
AC_MSG_RESULT([no])
set_precomp=no
m4_define([please_set_for_build], [Please set CC_FOR_BUILD, CFLAGS_FOR_BUILD, CPPFLAGS_FOR_BUILD, and/or LDFLAGS_FOR_BUILD.])
if test x"$use_ecmult_static_precomputation" = x"yes"; then
AC_MSG_ERROR([native compiler ${CC_FOR_BUILD} does not produce working binaries. please_set_for_build])
else
AC_MSG_WARN([Disabling statically generated ecmult table because the native compiler ${CC_FOR_BUILD} does not produce working binaries. please_set_for_build])
fi
else
AC_MSG_RESULT([yes])
set_precomp=yes
fi
else
set_precomp=no
fi

if test x"$req_asm" = x"auto"; then
SECP_64BIT_ASM_CHECK
if test x"$has_64bit_asm" = x"yes"; then
Expand Down Expand Up @@ -311,7 +264,7 @@ else
esac
fi

# select assembly optimization
# Select assembly optimization
use_external_asm=no

case $set_asm in
Expand All @@ -328,7 +281,12 @@ no)
;;
esac

# select wide multiplication implementation
if test x"$use_external_asm" = x"yes"; then
AC_DEFINE(USE_EXTERNAL_ASM, 1, [Define this symbol if an external (non-inline) assembly implementation is used])
fi


# Select wide multiplication implementation
case $set_widemul in
int128)
AC_DEFINE(USE_FORCE_WIDEMUL_INT128, 1, [Define this symbol to force the use of the (unsigned) __int128 based wide multiplication implementation])
Expand All @@ -343,7 +301,7 @@ auto)
;;
esac

# select bignum implementation
# Select bignum implementation
case $set_bignum in
gmp)
AC_DEFINE(HAVE_LIBGMP, 1, [Define this symbol if libgmp is installed])
Expand All @@ -361,7 +319,7 @@ no)
;;
esac

#set ecmult window size
# Set ecmult window size
if test x"$req_ecmult_window" = x"auto"; then
set_ecmult_window=15
else
Expand All @@ -383,7 +341,7 @@ case $set_ecmult_window in
;;
esac

#set ecmult gen precision
# Set ecmult gen precision
if test x"$req_ecmult_gen_precision" = x"auto"; then
set_ecmult_gen_precision=4
else
Expand Down Expand Up @@ -434,10 +392,70 @@ if test x"$enable_valgrind" = x"yes"; then
SECP_INCLUDES="$SECP_INCLUDES $VALGRIND_CPPFLAGS"
fi

# Handle static precomputation (after everything which modifies CFLAGS and friends)
if test x"$use_ecmult_static_precomputation" != x"no"; then
# Temporarily switch to an environment for the native compiler
save_cross_compiling=$cross_compiling
cross_compiling=no
SAVE_CC="$CC"
CC="$CC_FOR_BUILD"
SAVE_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS_FOR_BUILD"
SAVE_CPPFLAGS="$CPPFLAGS"
CPPFLAGS="$CPPFLAGS_FOR_BUILD"
SAVE_LDFLAGS="$LDFLAGS"
LDFLAGS="$LDFLAGS_FOR_BUILD"

warn_CFLAGS_FOR_BUILD="-Wall -Wextra -Wno-unused-function"
saved_CFLAGS="$CFLAGS"
CFLAGS="$warn_CFLAGS_FOR_BUILD $CFLAGS"
AC_MSG_CHECKING([if native ${CC_FOR_BUILD} supports ${warn_CFLAGS_FOR_BUILD}])
AC_COMPILE_IFELSE([AC_LANG_SOURCE([[char foo;]])],
[ AC_MSG_RESULT([yes]) ],
[ AC_MSG_RESULT([no])
CFLAGS="$saved_CFLAGS"
])

AC_MSG_CHECKING([for working native compiler: ${CC_FOR_BUILD}])
AC_RUN_IFELSE(
[AC_LANG_PROGRAM([], [])],
[working_native_cc=yes],
[working_native_cc=no],[:])

CFLAGS_FOR_BUILD="$CFLAGS"

# Restore the environment
cross_compiling=$save_cross_compiling
CC="$SAVE_CC"
CFLAGS="$SAVE_CFLAGS"
CPPFLAGS="$SAVE_CPPFLAGS"
LDFLAGS="$SAVE_LDFLAGS"

if test x"$working_native_cc" = x"no"; then
AC_MSG_RESULT([no])
set_precomp=no
m4_define([please_set_for_build], [Please set CC_FOR_BUILD, CFLAGS_FOR_BUILD, CPPFLAGS_FOR_BUILD, and/or LDFLAGS_FOR_BUILD.])
if test x"$use_ecmult_static_precomputation" = x"yes"; then
AC_MSG_ERROR([native compiler ${CC_FOR_BUILD} does not produce working binaries. please_set_for_build])
else
AC_MSG_WARN([Disabling statically generated ecmult table because the native compiler ${CC_FOR_BUILD} does not produce working binaries. please_set_for_build])
fi
else
AC_MSG_RESULT([yes])
set_precomp=yes
fi
else
set_precomp=no
fi

if test x"$set_precomp" = x"yes"; then
AC_DEFINE(USE_ECMULT_STATIC_PRECOMPUTATION, 1, [Define this symbol to use a statically generated ecmult table])
fi

###
### Handle module options
###

if test x"$enable_module_ecdh" = x"yes"; then
AC_DEFINE(ENABLE_MODULE_ECDH, 1, [Define this symbol to enable the ECDH module])
fi
Expand All @@ -457,14 +475,14 @@ if test x"$enable_module_extrakeys" = x"yes"; then
AC_DEFINE(ENABLE_MODULE_EXTRAKEYS, 1, [Define this symbol to enable the extrakeys module])
fi

if test x"$use_external_asm" = x"yes"; then
AC_DEFINE(USE_EXTERNAL_ASM, 1, [Define this symbol if an external (non-inline) assembly implementation is used])
fi

if test x"$use_external_default_callbacks" = x"yes"; then
AC_DEFINE(USE_EXTERNAL_DEFAULT_CALLBACKS, 1, [Define this symbol if an external implementation of the default callbacks is used])
fi

###
### Check for --enable-experimental if necessary
###

if test x"$enable_experimental" = x"yes"; then
AC_MSG_NOTICE([******])
AC_MSG_NOTICE([WARNING: experimental build])
Expand All @@ -484,6 +502,10 @@ else
fi
fi

###
### Generate output
###

AC_CONFIG_HEADERS([src/libsecp256k1-config.h])
AC_CONFIG_FILES([Makefile libsecp256k1.pc])
AC_SUBST(SECP_INCLUDES)
Expand All @@ -502,7 +524,7 @@ AM_CONDITIONAL([ENABLE_MODULE_SCHNORRSIG], [test x"$enable_module_schnorrsig" =
AM_CONDITIONAL([USE_EXTERNAL_ASM], [test x"$use_external_asm" = x"yes"])
AM_CONDITIONAL([USE_ASM_ARM], [test x"$set_asm" = x"arm"])

dnl make sure nothing new is exported so that we don't break the cache
# Make sure nothing new is exported so that we don't break the cache.
PKGCONFIG_PATH_TEMP="$PKG_CONFIG_PATH"
unset PKG_CONFIG_PATH
PKG_CONFIG_PATH="$PKGCONFIG_PATH_TEMP"
Expand All @@ -526,7 +548,7 @@ echo " asm = $set_asm"
echo " bignum = $set_bignum"
echo " ecmult window size = $set_ecmult_window"
echo " ecmult gen prec. bits = $set_ecmult_gen_precision"
dnl Hide test-only options unless they're used.
# Hide test-only options unless they're used.
if test x"$set_widemul" != xauto; then
echo " wide multiplication = $set_widemul"
fi
Expand Down

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