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authorUli Schlachter <psychon@znc.in>2014-07-21 17:10:16 +0200
committerBryce Harrington <bryce@osg.samsung.com>2014-08-01 13:11:31 -0700
commitc7ff9bb32e20679d6da4e8a2856be716e5bd9e12 (patch)
treeafcbb9994234d4477c3e39fdbdb0290c739f50ef
parent27c9923e9887bab5854ecccc81dda69687a0b9ae (diff)
Remove LTO support
This just never worked too well and caused too many issues. I don't think anyone will miss this. As mentioned in the below bug report, proper LTO support also requires using special versions of ranlib, nm and ar which support the LTO object files. Otherwise, calling the normal ranlib on an .a library breaks the list of exported symbols and thus completely breaks the static library. This (partly) reverts the following commits: c3645d97ebd24c6f7ad850785d585aebc706a11c configure.ac: Add a --disable-lto configure option d486ea30f1a58640a1178de74f705a73845b1cda configure: Conditionally include -flto 0870c6fb5b39dcc04fa376123848adde2d06d2ce gcc-4.5 warnings and optimisation flags. (The last commit is the one which brought us -flto in the first place even though it doesn't talk about this. It's also the one which is only reverted partly.) Fixes: https://bugs.freedesktop.org/show_bug.cgi?id=77060 CC: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Uli Schlachter <psychon@znc.in> Reviewed-by: Bryce Harrington <b.harrington@samsung.com>
-rw-r--r--build/configure.ac.warnings16
1 files changed, 0 insertions, 16 deletions
diff --git a/build/configure.ac.warnings b/build/configure.ac.warnings
index a72d9484a..2c4e34d1a 100644
--- a/build/configure.ac.warnings
+++ b/build/configure.ac.warnings
@@ -35,22 +35,6 @@ MAYBE_WARN="$MAYBE_WARN -erroff=E_ENUM_TYPE_MISMATCH_ARG \
dnl We also abuse the warning-flag facility to enable other compiler
dnl options. Namely, the following:
-
-dnl -flto working really needs a test link, not just a compile
-
-AC_ARG_ENABLE(lto,
- AS_HELP_STRING([--disable-lto],
- [Do not try to use Link-Time Optimization]))
-if test "x$enable_lto" != "xno"; then
- safe_MAYBE_WARN="$MAYBE_WARN"
- MAYBE_WARN="$MAYBE_WARN -flto"
- AC_TRY_LINK([],[
- int main(int argc, char **argv) { return 0; }
- ],[],[
- MAYBE_WARN="$safe_MAYBE_WARN"
- ])
-fi
-
MAYBE_WARN="$MAYBE_WARN -fno-strict-aliasing -fno-common"
dnl Also to turn various gcc/glibc-specific preprocessor checks