Compiling with 32bit flags leads to 64bit ruby

[apeiros]

Hi

I'm using Kenneth Reitz' GCC installer (https://github.com/kennethreitz/osx-gcc-installer), the newest rvm (1.10.0-pre) and OS X Lion 10.7.2.
I tried to install ruby 1.9.2p290 as 32bit executable, following http://beginrescueend.com/support/troubleshooting/ (section "i386 (32 bit)").
However, the compiled executable is 64bit.

Additional information:

$ uname -mprsv
Darwin 11.2.0 Darwin Kernel Version 11.2.0: Tue Aug  9 20:54:00 PDT 2011; root:xnu-1699.24.8~1/RELEASE_X86_64 x86_64 i386

$ rvm_archflags="-arch i386" CFLAGS='-m32' CXXFLAGS='-m32' LDFLAGS='-m32' rvm install ruby-1.9.2
# …snip…
Install of ruby-1.9.2-p290 - #complete 
$ rvm use 1.9.2
$ which ruby
/Users/apeiros/.rvm/rubies/ruby-1.9.2-p290/bin/ruby
$ file /Users/apeiros/.rvm/rubies/ruby-1.9.2-p290/bin/ruby
/Users/apeiros/.rvm/rubies/ruby-1.9.2-p290/bin/ruby: Mach-O 64-bit executable x86_64
$ cat ~/.rvm/src/ruby-1.9.2-p290/Makefile | grep '^arch ='
arch = x86_64-darwin11.2.0

If I can supply any other information, please let me know.

[mpapis]

please get familiar with this first: #562

[apeiros]

@mpapis thanks for the reply. I'm not sure what I should apply out of all of what's being discussed in issue 562.
I read it through and tried a couple of variations, none with success (i.e. it either didn't compile at all or yielded a 64bit ruby). I'll exhibit the one matching what you said last in issue 562:

$ cat ~/.rvmrc
export rvm_archflags='-arch i386'
export rvm_architectures='i386'
export rvm_configure_flags=--target=i686-apple-darwin11
# I opened a new shell to ensure those and only those env var settings where loaded

rvm install ruby-1.9.2-p290-nt6 --patch osx-arch-fix

Installing Ruby from source to: /Users/apeiros/.rvm/rubies/ruby-1.9.2-p290-nt6, this may take a while depending on your cpu(s)...

ruby-1.9.2-p290-nt6 - #fetching 
ruby-1.9.2-p290-nt6 - #extracting ruby-1.9.2-p290 to /Users/apeiros/.rvm/src/ruby-1.9.2-p290-nt6
ruby-1.9.2-p290-nt6 - #extracted to /Users/apeiros/.rvm/src/ruby-1.9.2-p290-nt6
Applying patch 'osx-arch-fix' (located at /Users/apeiros/.rvm/patches/ruby/1.9.2/osx-arch-fix.patch)
Fetching yaml-0.1.4.tar.gz to /Users/apeiros/.rvm/archives
Extracting yaml-0.1.4.tar.gz to /Users/apeiros/.rvm/src
Configuring yaml in /Users/apeiros/.rvm/src/yaml-0.1.4.
ERROR: Error running ' ./configure --prefix="/Users/apeiros/.rvm/usr" --target=i686-apple-darwin11           --build=i386-apple-darwin11.2.0           --host=i386-apple-darwin11.2.0 ', please read /Users/apeiros/.rvm/log/ruby-1.9.2-p290-nt6/yaml/configure.log
Compiling yaml in /Users/apeiros/.rvm/src/yaml-0.1.4.
Installing yaml to /Users/apeiros/.rvm/usr
ruby-1.9.2-p290-nt6 - #configuring 
ERROR: Error running ' ./configure --prefix=/Users/apeiros/.rvm/rubies/ruby-1.9.2-p290-nt6 --enable-shared --disable-install-doc --target=i686-apple-darwin11           --build=i386-apple-darwin11.2.0           --host=i386-apple-darwin11.2.0 --with-libyaml-dir=/Users/apeiros/.rvm/usr ', please read /Users/apeiros/.rvm/log/ruby-1.9.2-p290-nt6/configure.log
ERROR: There has been an error while running configure. Halting the installation.

$ cat /Users/apeiros/.rvm/log/ruby-1.9.2-p290-nt6/configure.log
[2011-12-02 11:05:32]  ./configure --prefix=/Users/apeiros/.rvm/rubies/ruby-1.9.2-p290-nt6 --enable-shared --disable-install-doc --target=i686-apple-darwin11           --build=i386-apple-darwin11.2.0           --host=i386-apple-darwin11.2.0 --with-libyaml-dir=/Users/apeiros/.rvm/usr 
configure: WARNING: unrecognized options: --with-libyaml-dir
checking build system type... i386-apple-darwin11.2.0
checking host system type... i386-apple-darwin11.2.0
checking target system type... i686-apple-darwin11
checking for i386-apple-darwin11.2.0-gcc... (cached) /usr/bin/gcc-4.2
checking whether the C compiler works... no
configure: error: in `/Users/apeiros/.rvm/src/ruby-1.9.2-p290-nt6':
configure: error: C compiler cannot create executables
See `config.log' for more details

# As stated before, I use Kenneth Reitz' GCC installer (GCC-10.7-v2)
$ /usr/bin/gcc-4.2 -v
Using built-in specs.
Target: i686-apple-darwin11
Configured with: /private/var/tmp/gcc/gcc-5666.3~278/src/configure --disable-checking --enable-werror --prefix=/usr --mandir=/share/man --enable-languages=c,objc,c++,obj-c++ --program-transform-name=/^[cg][^.-]*$/s/$/-4.2/ --with-slibdir=/usr/lib --build=i686-apple-darwin11 --program-prefix=i686-apple-darwin11- --host=x86_64-apple-darwin11 --target=i686-apple-darwin11 --with-gxx-include-dir=/include/c++/4.2.1
Thread model: posix
gcc version 4.2.1 (Apple Inc. build 5666) (dot 3)

[mpapis]

addition of --32 should fix your issue, use:

rvm get head
rvm reinstall ruby-1.9.2-p290-nt6 --32

[raskhadafi]

Thanks for the new flags but I didn't found them in the documentation!
I had to search in the issues.

[mpapis]

@raskhadafi i will be fixing the docs with RVM 2.0

[eevee]

Almost four years later, I wasted half a day chasing down a similar problem, because the flags are still not documented. I finally found them reading the source code.

[v6]

// , Interesting that rubygems seems to use the system architecture for building native extensions.

@eevee, how did you find this bug?

[eevee]

I have a 64-bit Linode running a 32-bit kernel.

It was originally all 32-bit, then they gave me a free upgrade to a 64-bit host, and I didn't see any good reason to redo a lot of ad-hoc stuff just to fix the mismatch.