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configure: Add -fno-ident when available

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MinGW for i386-pc without this option generates a .rdata$zzz symbol that is
page-aligned and hence lzma_decompress no longer fits in its allocated space.
Additionally, MinGW with -fno-ident also saves a bit of space in modules. In
case of other compilers we already strip the relevant sections, so, this
option has no effect.

More info can be found at https://github.com/msys2/MINGW-packages/issues/21

Signed-off-by: Vladimir Serbinenko <phcoder@gmail.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
This commit is contained in:
Vladimir Serbinenko 2019-07-09 17:46:25 +02:00 committed by Daniel Kiper
parent 15cfd02b74
commit 8f6843ce60
1 changed files with 11 additions and 0 deletions
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11
configure.ac
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@ -999,6 +999,17 @@ if test "x$grub_cv_cc_fno_unwind_tables" = xyes; then
TARGET_CFLAGS="$TARGET_CFLAGS -fno-unwind-tables"
fi
# Do not generate .ident sections.
AC_CACHE_CHECK([whether -fno-ident works], [grub_cv_cc_fno_ident], [
CFLAGS="$TARGET_CFLAGS -fno-ident"
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[]])],
[grub_cv_cc_fno_ident=yes],
[grub_cv_cc_fno_ident=no])
])
if test "x$grub_cv_cc_fno_ident" = xyes; then
TARGET_CFLAGS="$TARGET_CFLAGS -fno-ident"
fi
CFLAGS="$TARGET_CFLAGS"