[cairo-commit] build/configure.ac.warnings

[Bryce Harrington]

 build/configure.ac.warnings |   16 ----------------
 1 file changed, 16 deletions(-)

New commits:
commit c7ff9bb32e20679d6da4e8a2856be716e5bd9e12
Author: Uli Schlachter <psychon at znc.in>
Date:   Mon Jul 21 17:10:16 2014 +0200

    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 at chris-wilson.co.uk>
    Signed-off-by: Uli Schlachter <psychon at znc.in>
    Reviewed-by: Bryce Harrington <b.harrington at samsung.com>

diff --git a/build/configure.ac.warnings b/build/configure.ac.warnings
index a72d948..2c4e34d 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