Hello there, do I need -flto when building a static lib?
Here is an example:
E:\Desktopgcc foo.c -c -flto
E:\Desktopar rcs libfoo.a foo.o
E:\Desktopgcc main.c -L. -lfoo -flto
C:\Users\LH_Mouse\AppData\Local\Temp\ccc30oDd.ltrans0.ltrans.o:ccc30oDd.ltrans0.o:(.text+0x1e):
undefined reference to
Are you using GCC 4.9.0?
Since GCC 4.9.0, LTO-enabled object file doesn't contain normal object code
but GIMPLE bytecode by default.
If you want to link to a static library, you have to pass
-fuse-linker-plugin to let it extract LTO segments, and AFAIK it's enabled
by default when -flto is
2014-04-26
Best regards,
lh_mouse
发件人：TOCK Chiu stanley82...@gmail.com
发送时间：2014-04-26 21:20
主题：Re: [Mingw-w64-public] Do I need -flto when building a static lib?
收件人：mingw-w64-publicmingw-w64-public@lists.sourceforge.net
抄送：
Are you using GCC 4.9.0?
Since GCC 4.9.0, LTO-enabled object
Yes gcc 4.9.0.
Thread model: win32
gcc version 4.9.0 (i686-win32-sjlj-rev0, Built by MinGW-W64 project)
2014-04-26
Best regards,
lh_mouse
发件人：TOCK Chiu stanley82...@gmail.com
发送时间：2014-04-26 21:20
主题：Re: [Mingw-w64-public] Do I need -flto when building a static lib?
收件人：mingw-w64
Then you must experience the same thing as I did.
2014-04-26 21:24 GMT+08:00 lh_mouse lh_mo...@126.com:
Yes gcc 4.9.0.
Thread model: win32
gcc version 4.9.0 (i686-win32-sjlj-rev0, Built by MinGW-W64 project)
2014-04-26
--
Best regards,
lh_mouse
