安装ffi时出错

Question

似乎可以绕过这个问题。

$gem install ffi
Building native extensions.  This could take a while...
ERROR:  Error installing ffi:
ERROR: Failed to build gem native extension.

/remote/part/usern/.rvm/rubies/ruby-1.9.3-p448/bin/ruby extconf.rb
checking for ffi.h... no
checking for ffi.h in /usr/local/include,/usr/include/ffi... no
checking for rb_thread_blocking_region()... yes
checking for rb_thread_call_with_gvl()... yes
checking for rb_thread_call_without_gvl()... yes
checking for ffi_prep_cif_var()... no
creating extconf.h
creating Makefile

make
libffi.gnu.mk:16: Extraneous text after `else' directive
libffi.gnu.mk:18: *** only one `else' per conditional.  Stop.


Gem files will remain installed in /remote/part/usern/.rvm/gems/ruby-1.9.3-p448@myrailsapp/gems/ffi-1.9.0 for inspection.
Results logged to /remote/part/usern/.rvm/gems/ruby-1.9.3-p448@myrailsapp/gems/ffi-1.9.0/ext/ffi_c/gem_make.out

有什么想法吗？

Answer 1

在此之前尝试一下

sudo ln -s /usr/bin/gcc /usr/bin/gcc-4.2
apt-get install ruby{version}-dev

bundle install ffi

这对我很管用

Answer 2

我不得不将gcc设置为4.2，它起作用了。我还在Gemfile.lock中将ffi版本更改为1.0.9。

导出路径=/opt/gcc-4.2.0/bin/：$PATH

Answer 3

嗨，这与我更新的GCC编译器有关，我也做了Harpreet提到的技巧(ffi版本降级)，但没有必要ffi-1.9.3也能正常工作:D

在Gemfile.lock中

    ffi (1.9.3)
    ffi (1.9.3-x86-mingw32)

https://github.com/kennethreitz/osx-gcc-installer

click here github repo with the .pkg installer for all OS (not only MacOSX)