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CPP predefine conflict with getpc thunks
- From: David Miller <davem at davemloft dot net>
- To: libc-alpha at sourceware dot org
- Date: Tue, 23 Feb 2010 19:45:46 -0800 (PST)
- Subject: CPP predefine conflict with getpc thunks
Rephrasing this in an effort to get it past the moderator.
When gcc is targetting PENTIUM_PRO cpu target, it emits the CPP
predefined symbol __i686.
This breaks the build because all of the getpc thunks on x86 are
prefixed by "__i686.getpc..." which ends up being expanded to "1
.getpc..." by CPP
I've gotten the build to go through by configuring with CC="gcc
-U__i686" CXX="g++ -U__i686" but this really shouldn't be necessary to
get a successful build.
And on Fedora 12 on x86, gcc defaults to PENTIUM_PRO code generation.
So anyone who tries to build glibc on x86 is very likely to hit this
Maybe we can put the "-U__i686" in one of the x86 sysdep Makefiles?