From 71a194d8ca2efd075a5c000be0b378c8706ca0b3 Mon Sep 17 00:00:00 2001 From: Austin Seipp Date: Sat, 4 May 2013 16:07:22 -0500 Subject: Detect linker information at runtime. Fixes Trac #6063 Previously, we did ./configure time checks to see if 'GNU ld' supported certain options. If it does, we bake those options into the link step. See Trac #5240. Unfortunately, the linker we use at runtime can change for several reasons. One is that the user specifies -pgml 'foo'. The other is if /usr/bin/ld or whatnot changes from when GHC was built. Those options mentioned earlier are specific to GNU ld, but many systems support GNU gold too. This is Trac #6063. So we need to check at runtime what linker we're using. This is actually a little bit complicated because we normally use the C compiler as our linker. Windows and OS X are also special here. Finally, this patch also unconditionally gives '--hash-size=31' and '--reduce-memory-overheads' to the system linker if it's GNU ld. These options have been supported for 8+ years from what I can see, and there are probably a lot of other reasons why GHC would not work with such an ancient binutils, all things considered. See Note [Run-time linker info] in SysTools for details. There are plenty of comments as well in the surrounding code. Signed-off-by: Austin Seipp --- distrib/configure.ac.in | 2 -- 1 file changed, 2 deletions(-) (limited to 'distrib') diff --git a/distrib/configure.ac.in b/distrib/configure.ac.in index 6b20f849d4..4a6944fe17 100644 --- a/distrib/configure.ac.in +++ b/distrib/configure.ac.in @@ -72,8 +72,6 @@ AC_SUBST([LdCmd]) FP_GCC_VERSION AC_PROG_CPP -FP_PROG_LD_HashSize31 -FP_PROG_LD_ReduceMemoryOverheads FP_PROG_LD_IS_GNU FP_PROG_LD_BUILD_ID FP_PROG_LD_NO_COMPACT_UNWIND -- cgit v1.2.1