mirror of
https://git.kernel.org/pub/scm/bluetooth/bluez.git
synced 2024-11-17 01:04:40 +08:00
6a0e5bc087
On commit cc9e4e7cae, this flag was
mistakenly replaced with the behavior of the old --enable-fortify
option.
This patch restores the "-O0" flag when --disable-optimization is used.
Unfortunately, this is not enough to disable build optimization. By
default, autoconf adds -O2 to CFLAGS if the compiler is GCC. AM_CFLAGS
(where -O0 is added with --disable-optimization) is passed as argument
to GCC before autoconf CFLAGS, so it is not possible to override the
default -O2. One solution is to use:
CFLAGS= ./configure --disable-optimization
i.e. remove -O2 from CFLAGS, and let autoconf add -O0.
56 lines
1.7 KiB
Plaintext
56 lines
1.7 KiB
Plaintext
AC_DEFUN([AC_PROG_CC_PIE], [
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AC_CACHE_CHECK([whether ${CC-cc} accepts -fPIE], ac_cv_prog_cc_pie, [
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echo 'void f(){}' > conftest.c
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if test -z "`${CC-cc} -fPIE -pie -c conftest.c 2>&1`"; then
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ac_cv_prog_cc_pie=yes
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else
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ac_cv_prog_cc_pie=no
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fi
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rm -rf conftest*
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])
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])
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AC_DEFUN([COMPILER_FLAGS], [
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with_cflags=""
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if (test "$USE_MAINTAINER_MODE" = "yes"); then
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with_cflags="$with_cflags -Wall -Werror -Wextra"
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with_cflags="$with_cflags -Wno-unused-parameter"
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with_cflags="$with_cflags -Wno-missing-field-initializers"
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with_cflags="$with_cflags -Wdeclaration-after-statement"
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with_cflags="$with_cflags -Wmissing-declarations"
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with_cflags="$with_cflags -Wredundant-decls"
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with_cflags="$with_cflags -Wcast-align"
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with_cflags="$with_cflags -DG_DISABLE_DEPRECATED"
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fi
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AC_SUBST([WARNING_CFLAGS], $with_cflags)
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])
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AC_DEFUN([MISC_FLAGS], [
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misc_cflags=""
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misc_ldflags=""
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AC_ARG_ENABLE(optimization, AC_HELP_STRING([--disable-optimization],
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[disable code optimization through compiler]), [
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if (test "${enableval}" = "no"); then
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misc_cflags="$misc_cflags -O0"
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fi
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])
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AC_ARG_ENABLE(debug, AC_HELP_STRING([--enable-debug],
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[enable compiling with debugging information]), [
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if (test "${enableval}" = "yes" &&
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test "${ac_cv_prog_cc_g}" = "yes"); then
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misc_cflags="$misc_cflags -g"
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fi
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])
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AC_ARG_ENABLE(pie, AC_HELP_STRING([--enable-pie],
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[enable position independent executables flag]), [
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if (test "${enableval}" = "yes" &&
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test "${ac_cv_prog_cc_pie}" = "yes"); then
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misc_cflags="$misc_cflags -fPIC"
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misc_ldflags="$misc_ldflags -pie"
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fi
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])
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AC_SUBST([MISC_CFLAGS], $misc_cflags)
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AC_SUBST([MISC_LDFLAGS], $misc_ldflags)
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])
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