I've just tried setting up a new development machine and I'm stuck installing the ffi gem for ruby.
According to a bug I found (can't find it now I'm afraid) the gentoo devs do not support installing gems via the gem command and directed the user to use the dev-ruby/ffi package. Unfortnately, that package is absolutely ancient and unusable. Anyway, I've got the ffi library install from portage, but when I try to `gem install ffi`, I get the output seen in the attachement. The same gem installs just fine on an ubuntu box, but...well it's ubuntu and I don't want to use that (besides it's just a VM). I'd really like to get this fixed so I can get started on a new project. Grateful for any help Matt
ERROR: Error installing ffi:
ERROR: Failed to build gem native extension.
/usr/bin/ruby18 extconf.rb
checking for ffi_call() in -lffi... yes
checking for ffi_prep_closure()... yes
checking for ffi_raw_call()... yes
checking for ffi_prep_raw_closure()... yes
checking for rb_thread_blocking_region()... no
checking for ruby_thread_has_gvl_p()... no
checking for ruby_native_thread_p()... no
checking for rb_thread_call_with_gvl()... no
creating extconf.h
creating Makefile
make
i686-pc-linux-gnu-gcc -I. -I. -I/usr/lib/ruby/1.8/i686-linux -I.
-DRUBY_EXTCONF_H=\"extconf.h\" -D_FILE_OFFSET_BITS=64 -fPIC -O2 -march=i686
-pipe -fno-strict-aliasing -fPIC -I/usr/lib/libffi-3.0.9/include
-Wno-declaration-after-statement -c DynamicLibrary.c
i686-pc-linux-gnu-gcc -I. -I. -I/usr/lib/ruby/1.8/i686-linux -I.
-DRUBY_EXTCONF_H=\"extconf.h\" -D_FILE_OFFSET_BITS=64 -fPIC -O2 -march=i686
-pipe -fno-strict-aliasing -fPIC -I/usr/lib/libffi-3.0.9/include
-Wno-declaration-after-statement -c Buffer.c
i686-pc-linux-gnu-gcc -I. -I. -I/usr/lib/ruby/1.8/i686-linux -I.
-DRUBY_EXTCONF_H=\"extconf.h\" -D_FILE_OFFSET_BITS=64 -fPIC -O2 -march=i686
-pipe -fno-strict-aliasing -fPIC -I/usr/lib/libffi-3.0.9/include
-Wno-declaration-after-statement -c MemoryPointer.c
i686-pc-linux-gnu-gcc -I. -I. -I/usr/lib/ruby/1.8/i686-linux -I.
-DRUBY_EXTCONF_H=\"extconf.h\" -D_FILE_OFFSET_BITS=64 -fPIC -O2 -march=i686
-pipe -fno-strict-aliasing -fPIC -I/usr/lib/libffi-3.0.9/include
-Wno-declaration-after-statement -c StructByReference.c
i686-pc-linux-gnu-gcc -I. -I. -I/usr/lib/ruby/1.8/i686-linux -I.
-DRUBY_EXTCONF_H=\"extconf.h\" -D_FILE_OFFSET_BITS=64 -fPIC -O2 -march=i686
-pipe -fno-strict-aliasing -fPIC -I/usr/lib/libffi-3.0.9/include
-Wno-declaration-after-statement -c StructByValue.c
i686-pc-linux-gnu-gcc -I. -I. -I/usr/lib/ruby/1.8/i686-linux -I.
-DRUBY_EXTCONF_H=\"extconf.h\" -D_FILE_OFFSET_BITS=64 -fPIC -O2 -march=i686
-pipe -fno-strict-aliasing -fPIC -I/usr/lib/libffi-3.0.9/include
-Wno-declaration-after-statement -c StructLayout.c
i686-pc-linux-gnu-gcc -I. -I. -I/usr/lib/ruby/1.8/i686-linux -I.
-DRUBY_EXTCONF_H=\"extconf.h\" -D_FILE_OFFSET_BITS=64 -fPIC -O2 -march=i686
-pipe -fno-strict-aliasing -fPIC -I/usr/lib/libffi-3.0.9/include
-Wno-declaration-after-statement -c Thread.c
i686-pc-linux-gnu-gcc -I. -I. -I/usr/lib/ruby/1.8/i686-linux -I.
-DRUBY_EXTCONF_H=\"extconf.h\" -D_FILE_OFFSET_BITS=64 -fPIC -O2 -march=i686
-pipe -fno-strict-aliasing -fPIC -I/usr/lib/libffi-3.0.9/include
-Wno-declaration-after-statement -c DataConverter.c
i686-pc-linux-gnu-gcc -I. -I. -I/usr/lib/ruby/1.8/i686-linux -I.
-DRUBY_EXTCONF_H=\"extconf.h\" -D_FILE_OFFSET_BITS=64 -fPIC -O2 -march=i686
-pipe -fno-strict-aliasing -fPIC -I/usr/lib/libffi-3.0.9/include
-Wno-declaration-after-statement -c Types.c
i686-pc-linux-gnu-gcc -I. -I. -I/usr/lib/ruby/1.8/i686-linux -I.
-DRUBY_EXTCONF_H=\"extconf.h\" -D_FILE_OFFSET_BITS=64 -fPIC -O2 -march=i686
-pipe -fno-strict-aliasing -fPIC -I/usr/lib/libffi-3.0.9/include
-Wno-declaration-after-statement -c AbstractMemory.c
i686-pc-linux-gnu-gcc -I. -I. -I/usr/lib/ruby/1.8/i686-linux -I.
-DRUBY_EXTCONF_H=\"extconf.h\" -D_FILE_OFFSET_BITS=64 -fPIC -O2 -march=i686
-pipe -fno-strict-aliasing -fPIC -I/usr/lib/libffi-3.0.9/include
-Wno-declaration-after-statement -c Platform.c
i686-pc-linux-gnu-gcc -I. -I. -I/usr/lib/ruby/1.8/i686-linux -I.
-DRUBY_EXTCONF_H=\"extconf.h\" -D_FILE_OFFSET_BITS=64 -fPIC -O2 -march=i686
-pipe -fno-strict-aliasing -fPIC -I/usr/lib/libffi-3.0.9/include
-Wno-declaration-after-statement -c ArrayType.c
i686-pc-linux-gnu-gcc -I. -I. -I/usr/lib/ruby/1.8/i686-linux -I.
-DRUBY_EXTCONF_H=\"extconf.h\" -D_FILE_OFFSET_BITS=64 -fPIC -O2 -march=i686
-pipe -fno-strict-aliasing -fPIC -I/usr/lib/libffi-3.0.9/include
-Wno-declaration-after-statement -c ffi.c
i686-pc-linux-gnu-gcc -I. -I. -I/usr/lib/ruby/1.8/i686-linux -I.
-DRUBY_EXTCONF_H=\"extconf.h\" -D_FILE_OFFSET_BITS=64 -fPIC -O2 -march=i686
-pipe -fno-strict-aliasing -fPIC -I/usr/lib/libffi-3.0.9/include
-Wno-declaration-after-statement -c LastError.c
i686-pc-linux-gnu-gcc -I. -I. -I/usr/lib/ruby/1.8/i686-linux -I.
-DRUBY_EXTCONF_H=\"extconf.h\" -D_FILE_OFFSET_BITS=64 -fPIC -O2 -march=i686
-pipe -fno-strict-aliasing -fPIC -I/usr/lib/libffi-3.0.9/include
-Wno-declaration-after-statement -c FunctionInfo.c
i686-pc-linux-gnu-gcc -I. -I. -I/usr/lib/ruby/1.8/i686-linux -I.
-DRUBY_EXTCONF_H=\"extconf.h\" -D_FILE_OFFSET_BITS=64 -fPIC -O2 -march=i686
-pipe -fno-strict-aliasing -fPIC -I/usr/lib/libffi-3.0.9/include
-Wno-declaration-after-statement -c MappedType.c
i686-pc-linux-gnu-gcc -I. -I. -I/usr/lib/ruby/1.8/i686-linux -I.
-DRUBY_EXTCONF_H=\"extconf.h\" -D_FILE_OFFSET_BITS=64 -fPIC -O2 -march=i686
-pipe -fno-strict-aliasing -fPIC -I/usr/lib/libffi-3.0.9/include
-Wno-declaration-after-statement -c Variadic.c
i686-pc-linux-gnu-gcc -I. -I. -I/usr/lib/ruby/1.8/i686-linux -I.
-DRUBY_EXTCONF_H=\"extconf.h\" -D_FILE_OFFSET_BITS=64 -fPIC -O2 -march=i686
-pipe -fno-strict-aliasing -fPIC -I/usr/lib/libffi-3.0.9/include
-Wno-declaration-after-statement -c Function.c
i686-pc-linux-gnu-gcc -I. -I. -I/usr/lib/ruby/1.8/i686-linux -I.
-DRUBY_EXTCONF_H=\"extconf.h\" -D_FILE_OFFSET_BITS=64 -fPIC -O2 -march=i686
-pipe -fno-strict-aliasing -fPIC -I/usr/lib/libffi-3.0.9/include
-Wno-declaration-after-statement -c Call.c
i686-pc-linux-gnu-gcc -I. -I. -I/usr/lib/ruby/1.8/i686-linux -I.
-DRUBY_EXTCONF_H=\"extconf.h\" -D_FILE_OFFSET_BITS=64 -fPIC -O2 -march=i686
-pipe -fno-strict-aliasing -fPIC -I/usr/lib/libffi-3.0.9/include
-Wno-declaration-after-statement -c Type.c
i686-pc-linux-gnu-gcc -I. -I. -I/usr/lib/ruby/1.8/i686-linux -I.
-DRUBY_EXTCONF_H=\"extconf.h\" -D_FILE_OFFSET_BITS=64 -fPIC -O2 -march=i686
-pipe -fno-strict-aliasing -fPIC -I/usr/lib/libffi-3.0.9/include
-Wno-declaration-after-statement -c Pointer.c
i686-pc-linux-gnu-gcc -I. -I. -I/usr/lib/ruby/1.8/i686-linux -I.
-DRUBY_EXTCONF_H=\"extconf.h\" -D_FILE_OFFSET_BITS=64 -fPIC -O2 -march=i686
-pipe -fno-strict-aliasing -fPIC -I/usr/lib/libffi-3.0.9/include
-Wno-declaration-after-statement -c MethodHandle.c
i686-pc-linux-gnu-gcc -I. -I. -I/usr/lib/ruby/1.8/i686-linux -I.
-DRUBY_EXTCONF_H=\"extconf.h\" -D_FILE_OFFSET_BITS=64 -fPIC -O2 -march=i686
-pipe -fno-strict-aliasing -fPIC -I/usr/lib/libffi-3.0.9/include
-Wno-declaration-after-statement -c ClosurePool.c
i686-pc-linux-gnu-gcc -I. -I. -I/usr/lib/ruby/1.8/i686-linux -I.
-DRUBY_EXTCONF_H=\"extconf.h\" -D_FILE_OFFSET_BITS=64 -fPIC -O2 -march=i686
-pipe -fno-strict-aliasing -fPIC -I/usr/lib/libffi-3.0.9/include
-Wno-declaration-after-statement -c Struct.c
i686-pc-linux-gnu-gcc -shared -o ffi_c.so DynamicLibrary.o Buffer.o
MemoryPointer.o StructByReference.o StructByValue.o StructLayout.o Thread.o
DataConverter.o Types.o AbstractMemory.o Platform.o ArrayType.o ffi.o
LastError.o FunctionInfo.o MappedType.o Variadic.o Function.o Call.o Type.o
Pointer.o MethodHandle.o ClosurePool.o Struct.o -L. -L/usr/lib -Wl,-R/usr/lib
-L. -Wl,-O1 -Wl,--as-needed -rdynamic -Wl,-export-dynamic -Wl,--no-undefined
-Wl,-R -Wl,/usr/lib -L/usr/lib -lruby18 -lffi -lffi -lrt -ldl -lcrypt -lm
-lc
Thread.o: In function `rbffi_thread_blocking_region':
Thread.c:(.text+0x115): undefined reference to `pthread_create'
Thread.c:(.text+0x159): undefined reference to `pthread_join'
Thread.o: In function `cleanup_blocking_thread':
Thread.c:(.text+0x2f6): undefined reference to `pthread_kill'
Thread.o: In function `rbffi_blocking_thread':
Thread.c:(.text+0x348): undefined reference to `pthread_testcancel'
collect2: ld returned 1 exit status
make: *** [ffi_c.so] Error 1
Gem files will remain installed in /usr/lib/ruby/gems/1.8/gems/ffi-1.0.7 for
inspection.
Results logged to /usr/lib/ruby/gems/1.8/gems/ffi-1.0.7/ext/ffi_c/gem_make.out
Building native extensions. This could take a while...
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