b53f595b3e
We don't use lgcc_s but missing lgcc_s or another library cause test to fail. So use -nostdlib. We need to use -Werror to avoid warning-generated case to be accepted. Clang uses -nopie rather than -no-pie. Check both and use whichever one works. Additionally android clang passes -pie to the linker even though it doesn't define __PIE__. So if compilation without no-pie logic fails add -nopie/-no-pie even if __PIE__ is not defined.
477 lines
13 KiB
Text
477 lines
13 KiB
Text
dnl Redefine AC_LANG_PROGRAM with a "-Wstrict-prototypes -Werror"-friendly
|
||
dnl version. Patch submitted to bug-autoconf in 2009-09-16.
|
||
m4_define([AC_LANG_PROGRAM(C)],
|
||
[$1
|
||
int
|
||
main (void)
|
||
{
|
||
dnl Do *not* indent the following line: there may be CPP directives.
|
||
dnl Don't move the `;' right after for the same reason.
|
||
$2
|
||
;
|
||
return 0;
|
||
}])
|
||
|
||
|
||
dnl Check whether target compiler is working
|
||
AC_DEFUN([grub_PROG_TARGET_CC],
|
||
[AC_MSG_CHECKING([whether target compiler is working])
|
||
AC_CACHE_VAL(grub_cv_prog_target_cc,
|
||
[AC_LINK_IFELSE([AC_LANG_PROGRAM([[
|
||
asm (".globl start; start:");
|
||
void __main (void);
|
||
void __main (void) {}
|
||
int main (void);
|
||
]], [[]])],
|
||
[grub_cv_prog_target_cc=yes],
|
||
[grub_cv_prog_target_cc=no])
|
||
])
|
||
AC_MSG_RESULT([$grub_cv_prog_target_cc])
|
||
|
||
if test "x$grub_cv_prog_target_cc" = xno; then
|
||
AC_MSG_ERROR([cannot compile for the target])
|
||
fi
|
||
])
|
||
|
||
|
||
dnl grub_ASM_USCORE checks if C symbols get an underscore after
|
||
dnl compiling to assembler.
|
||
dnl Written by Pavel Roskin. Based on grub_ASM_EXT_C written by
|
||
dnl Erich Boleyn and modified by Yoshinori K. Okuji.
|
||
AC_DEFUN([grub_ASM_USCORE],
|
||
[AC_REQUIRE([AC_PROG_CC])
|
||
AC_REQUIRE([AC_PROG_EGREP])
|
||
AC_MSG_CHECKING([if C symbols get an underscore after compilation])
|
||
AC_CACHE_VAL(grub_cv_asm_uscore,
|
||
[cat > conftest.c <<\EOF
|
||
int func (int *);
|
||
int
|
||
func (int *list)
|
||
{
|
||
*list = 0;
|
||
return *list;
|
||
}
|
||
EOF
|
||
|
||
if AC_TRY_COMMAND([${CC-cc} ${CFLAGS} -S conftest.c]) && test -s conftest.s; then
|
||
true
|
||
else
|
||
AC_MSG_ERROR([${CC-cc} failed to produce assembly code])
|
||
fi
|
||
|
||
if $EGREP '(^|[^_[:alnum]])_func' conftest.s >/dev/null 2>&1; then
|
||
HAVE_ASM_USCORE=1
|
||
grub_cv_asm_uscore=yes
|
||
else
|
||
HAVE_ASM_USCORE=0
|
||
grub_cv_asm_uscore=no
|
||
fi
|
||
|
||
rm -f conftest*])
|
||
|
||
AC_MSG_RESULT([$grub_cv_asm_uscore])
|
||
])
|
||
|
||
|
||
dnl Some versions of `objcopy -O binary' vary their output depending
|
||
dnl on the link address.
|
||
AC_DEFUN([grub_PROG_OBJCOPY_ABSOLUTE],
|
||
[AC_MSG_CHECKING([whether ${TARGET_OBJCOPY} works for absolute addresses])
|
||
AC_CACHE_VAL(grub_cv_prog_objcopy_absolute,
|
||
[cat > conftest.c <<\EOF
|
||
void cmain (void);
|
||
void
|
||
cmain (void)
|
||
{
|
||
*((int *) 0x1000) = 2;
|
||
}
|
||
EOF
|
||
|
||
if AC_TRY_EVAL(ac_compile) && test -s conftest.o; then :
|
||
else
|
||
AC_MSG_ERROR([${CC-cc} cannot compile C source code])
|
||
fi
|
||
grub_cv_prog_objcopy_absolute=yes
|
||
for link_addr in 0x2000 0x8000 0x7C00; do
|
||
if AC_TRY_COMMAND([${CC-cc} ${TARGET_CFLAGS} ${TARGET_LDFLAGS} -nostdlib ${TARGET_IMG_LDFLAGS_AC} ${TARGET_IMG_BASE_LDOPT},$link_addr conftest.o -o conftest.exec]); then :
|
||
else
|
||
AC_MSG_ERROR([${CC-cc} cannot link at address $link_addr])
|
||
fi
|
||
if AC_TRY_COMMAND([${TARGET_OBJCOPY-objcopy} --only-section=.text -O binary conftest.exec conftest]); then :
|
||
else
|
||
AC_MSG_ERROR([${TARGET_OBJCOPY-objcopy} cannot create binary files])
|
||
fi
|
||
if test ! -f conftest.old || AC_TRY_COMMAND([cmp -s conftest.old conftest]); then
|
||
mv -f conftest conftest.old
|
||
else
|
||
grub_cv_prog_objcopy_absolute=no
|
||
break
|
||
fi
|
||
done
|
||
rm -f conftest*])
|
||
AC_MSG_RESULT([$grub_cv_prog_objcopy_absolute])
|
||
|
||
if test "x$grub_cv_prog_objcopy_absolute" = xno; then
|
||
AC_MSG_ERROR([GRUB requires a working absolute objcopy; upgrade your binutils])
|
||
fi
|
||
])
|
||
|
||
|
||
dnl Supply --build-id=none to ld if building modules.
|
||
dnl This suppresses warnings from ld on some systems
|
||
AC_DEFUN([grub_PROG_LD_BUILD_ID_NONE],
|
||
[AC_MSG_CHECKING([whether linker accepts --build-id=none])
|
||
AC_CACHE_VAL(grub_cv_prog_ld_build_id_none,
|
||
[save_LDFLAGS="$LDFLAGS"
|
||
LDFLAGS="$LDFLAGS -Wl,--build-id=none"
|
||
AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[]])],
|
||
[grub_cv_prog_ld_build_id_none=yes],
|
||
[grub_cv_prog_ld_build_id_none=no])
|
||
LDFLAGS="$save_LDFLAGS"
|
||
])
|
||
AC_MSG_RESULT([$grub_cv_prog_ld_build_id_none])
|
||
|
||
if test "x$grub_cv_prog_ld_build_id_none" = xyes; then
|
||
TARGET_LDFLAGS="$TARGET_LDFLAGS -Wl,--build-id=none"
|
||
fi
|
||
])
|
||
|
||
dnl Check nm
|
||
AC_DEFUN([grub_PROG_NM_WORKS],
|
||
[AC_MSG_CHECKING([whether nm works])
|
||
AC_CACHE_VAL(grub_cv_prog_nm_works,
|
||
[
|
||
nm_works_tmp_dir="$(mktemp -d "./confXXXXXX")"
|
||
AC_LANG_CONFTEST([AC_LANG_PROGRAM([[]], [[]])])
|
||
$TARGET_CC $TARGET_CFLAGS -c conftest.c -o "$nm_works_tmp_dir/ef"
|
||
if $TARGET_NM "$nm_works_tmp_dir/ef" > /dev/null; then
|
||
grub_cv_prog_nm_works=yes
|
||
else
|
||
grub_cv_prog_nm_minus_p=no
|
||
fi
|
||
rm "$nm_works_tmp_dir/ef"
|
||
rmdir "$nm_works_tmp_dir"
|
||
])
|
||
AC_MSG_RESULT([$grub_cv_prog_nm_works])
|
||
|
||
if test "x$grub_cv_prog_nm_works" != xyes; then
|
||
AC_MSG_ERROR([nm does not work])
|
||
fi
|
||
])
|
||
|
||
dnl Supply -P to nm
|
||
AC_DEFUN([grub_PROG_NM_MINUS_P],
|
||
[AC_MSG_CHECKING([whether nm accepts -P])
|
||
AC_CACHE_VAL(grub_cv_prog_nm_minus_p,
|
||
[
|
||
nm_minus_p_tmp_dir="$(mktemp -d "./confXXXXXX")"
|
||
AC_LANG_CONFTEST([AC_LANG_PROGRAM([[]], [[]])])
|
||
$TARGET_CC $TARGET_CFLAGS -c conftest.c -o "$nm_minus_p_tmp_dir/ef"
|
||
if $TARGET_NM -P "$nm_minus_p_tmp_dir/ef" 2>&1 > /dev/null; then
|
||
grub_cv_prog_nm_minus_p=yes
|
||
else
|
||
grub_cv_prog_nm_minus_p=no
|
||
fi
|
||
rm "$nm_minus_p_tmp_dir/ef"
|
||
rmdir "$nm_minus_p_tmp_dir"
|
||
])
|
||
AC_MSG_RESULT([$grub_cv_prog_nm_minus_p])
|
||
|
||
if test "x$grub_cv_prog_nm_minus_p" = xyes; then
|
||
TARGET_NMFLAGS_MINUS_P="-P"
|
||
else
|
||
TARGET_NMFLAGS_MINUS_P=
|
||
fi
|
||
])
|
||
|
||
dnl Supply --defined-only to nm
|
||
AC_DEFUN([grub_PROG_NM_DEFINED_ONLY],
|
||
[AC_MSG_CHECKING([whether nm accepts --defined-only])
|
||
AC_CACHE_VAL(grub_cv_prog_nm_defined_only,
|
||
[
|
||
nm_defined_only_tmp_dir="$(mktemp -d "./confXXXXXX")"
|
||
AC_LANG_CONFTEST([AC_LANG_PROGRAM([[]], [[]])])
|
||
$TARGET_CC $TARGET_CFLAGS -c conftest.c -o "$nm_defined_only_tmp_dir/ef"
|
||
if $TARGET_NM --defined-only "$nm_defined_only_tmp_dir/ef" 2>&1 > /dev/null; then
|
||
grub_cv_prog_nm_defined_only=yes
|
||
else
|
||
grub_cv_prog_nm_defined_only=no
|
||
fi
|
||
rm "$nm_defined_only_tmp_dir/ef"
|
||
rmdir "$nm_defined_only_tmp_dir"
|
||
])
|
||
AC_MSG_RESULT([$grub_cv_prog_nm_defined_only])
|
||
|
||
if test "x$grub_cv_prog_nm_defined_only" = xyes; then
|
||
TARGET_NMFLAGS_DEFINED_ONLY=--defined-only
|
||
else
|
||
TARGET_NMFLAGS_DEFINED_ONLY=
|
||
fi
|
||
])
|
||
|
||
|
||
dnl Check what symbol is defined as a bss start symbol.
|
||
dnl Written by Michael Hohmoth and Yoshinori K. Okuji.
|
||
AC_DEFUN([grub_CHECK_BSS_START_SYMBOL],
|
||
[AC_REQUIRE([AC_PROG_CC])
|
||
AC_MSG_CHECKING([if __bss_start is defined by the compiler])
|
||
AC_CACHE_VAL(grub_cv_check_uscore_uscore_bss_start_symbol,
|
||
[AC_LINK_IFELSE([AC_LANG_PROGRAM([[
|
||
asm (".globl start; start:");
|
||
void __main (void);
|
||
void __main (void) {}
|
||
int main (void);
|
||
]],
|
||
[[asm ("incl __bss_start")]])],
|
||
[grub_cv_check_uscore_uscore_bss_start_symbol=yes],
|
||
[grub_cv_check_uscore_uscore_bss_start_symbol=no])])
|
||
|
||
AC_MSG_RESULT([$grub_cv_check_uscore_uscore_bss_start_symbol])
|
||
|
||
AC_MSG_CHECKING([if edata is defined by the compiler])
|
||
AC_CACHE_VAL(grub_cv_check_edata_symbol,
|
||
[AC_LINK_IFELSE([AC_LANG_PROGRAM([[
|
||
asm (".globl start; start:");
|
||
void __main (void);
|
||
void __main (void) {}
|
||
int main (void);]],
|
||
[[asm ("incl edata")]])],
|
||
[grub_cv_check_edata_symbol=yes],
|
||
[grub_cv_check_edata_symbol=no])])
|
||
|
||
AC_MSG_RESULT([$grub_cv_check_edata_symbol])
|
||
|
||
AC_MSG_CHECKING([if _edata is defined by the compiler])
|
||
AC_CACHE_VAL(grub_cv_check_uscore_edata_symbol,
|
||
[AC_LINK_IFELSE([AC_LANG_PROGRAM([[
|
||
asm (".globl start; start:");
|
||
void __main (void);
|
||
void __main (void) {}
|
||
int main (void);]],
|
||
[[asm ("incl _edata")]])],
|
||
[grub_cv_check_uscore_edata_symbol=yes],
|
||
[grub_cv_check_uscore_edata_symbol=no])])
|
||
|
||
AC_MSG_RESULT([$grub_cv_check_uscore_edata_symbol])
|
||
|
||
if test "x$grub_cv_check_uscore_uscore_bss_start_symbol" = xyes; then
|
||
BSS_START_SYMBOL=__bss_start
|
||
elif test "x$grub_cv_check_edata_symbol" = xyes; then
|
||
BSS_START_SYMBOL=edata
|
||
elif test "x$grub_cv_check_uscore_edata_symbol" = xyes; then
|
||
BSS_START_SYMBOL=_edata
|
||
else
|
||
AC_MSG_ERROR([none of __bss_start, edata or _edata is defined])
|
||
fi
|
||
])
|
||
|
||
dnl Check what symbol is defined as an end symbol.
|
||
dnl Written by Yoshinori K. Okuji.
|
||
AC_DEFUN([grub_CHECK_END_SYMBOL],
|
||
[AC_REQUIRE([AC_PROG_CC])
|
||
AC_MSG_CHECKING([if end is defined by the compiler])
|
||
AC_CACHE_VAL(grub_cv_check_end_symbol,
|
||
[AC_LINK_IFELSE([AC_LANG_PROGRAM([[
|
||
asm (".globl start; start:");
|
||
void __main (void);
|
||
void __main (void) {}
|
||
int main (void);]],
|
||
[[asm ("incl end")]])],
|
||
[grub_cv_check_end_symbol=yes],
|
||
[grub_cv_check_end_symbol=no])])
|
||
|
||
AC_MSG_RESULT([$grub_cv_check_end_symbol])
|
||
|
||
AC_MSG_CHECKING([if _end is defined by the compiler])
|
||
AC_CACHE_VAL(grub_cv_check_uscore_end_symbol,
|
||
[AC_LINK_IFELSE([AC_LANG_PROGRAM([[
|
||
asm (".globl start; start:");
|
||
void __main (void);
|
||
void __main (void) {}
|
||
int main (void);]],
|
||
[[asm ("incl _end")]])],
|
||
[grub_cv_check_uscore_end_symbol=yes],
|
||
[grub_cv_check_uscore_end_symbol=no])])
|
||
|
||
AC_MSG_RESULT([$grub_cv_check_uscore_end_symbol])
|
||
|
||
if test "x$grub_cv_check_end_symbol" = xyes; then
|
||
END_SYMBOL=end
|
||
elif test "x$grub_cv_check_uscore_end_symbol" = xyes; then
|
||
END_SYMBOL=_end
|
||
else
|
||
AC_MSG_ERROR([neither end nor _end is defined])
|
||
fi
|
||
])
|
||
|
||
|
||
dnl Check if the C compiler supports `-fstack-protector'.
|
||
AC_DEFUN([grub_CHECK_STACK_PROTECTOR],[
|
||
[# Smashing stack protector.
|
||
ssp_possible=yes]
|
||
AC_MSG_CHECKING([whether `$CC' accepts `-fstack-protector'])
|
||
# Is this a reliable test case?
|
||
AC_LANG_CONFTEST([AC_LANG_SOURCE([[
|
||
void foo (void) { volatile char a[8]; a[3]; }
|
||
]])])
|
||
[# `$CC -c -o ...' might not be portable. But, oh, well... Is calling
|
||
# `ac_compile' like this correct, after all?
|
||
if eval "$ac_compile -S -fstack-protector -o conftest.s" 2> /dev/null; then]
|
||
AC_MSG_RESULT([yes])
|
||
[# Should we clear up other files as well, having called `AC_LANG_CONFTEST'?
|
||
rm -f conftest.s
|
||
else
|
||
ssp_possible=no]
|
||
AC_MSG_RESULT([no])
|
||
[fi]
|
||
])
|
||
|
||
dnl Check if the C compiler supports `-mstack-arg-probe' (Cygwin).
|
||
AC_DEFUN([grub_CHECK_STACK_ARG_PROBE],[
|
||
[# Smashing stack arg probe.
|
||
sap_possible=yes]
|
||
AC_MSG_CHECKING([whether `$CC' accepts `-mstack-arg-probe'])
|
||
AC_LANG_CONFTEST([AC_LANG_SOURCE([[
|
||
void foo (void) { volatile char a[8]; a[3]; }
|
||
]])])
|
||
[if eval "$ac_compile -S -mstack-arg-probe -Werror -o conftest.s" 2> /dev/null; then]
|
||
AC_MSG_RESULT([yes])
|
||
[# Should we clear up other files as well, having called `AC_LANG_CONFTEST'?
|
||
rm -f conftest.s
|
||
else
|
||
sap_possible=no]
|
||
AC_MSG_RESULT([no])
|
||
[fi]
|
||
])
|
||
|
||
dnl Check if ln -s can handle directories properly (mingw).
|
||
AC_DEFUN([grub_CHECK_LINK_DIR],[
|
||
AC_MSG_CHECKING([whether ln -s can handle directories properly])
|
||
[mkdir testdir 2>/dev/null
|
||
case $srcdir in
|
||
[\\/$]* | ?:[\\/]* ) reldir=$srcdir/include/grub/util ;;
|
||
*) reldir=../$srcdir/include/grub/util ;;
|
||
esac
|
||
if ln -s $reldir testdir/util 2>/dev/null && rm -f testdir/util 2>/dev/null ; then]
|
||
AC_MSG_RESULT([yes])
|
||
[link_dir=yes
|
||
else
|
||
link_dir=no]
|
||
AC_MSG_RESULT([no])
|
||
[fi
|
||
rm -rf testdir]
|
||
])
|
||
|
||
dnl Check if the C compiler supports `-fPIE'.
|
||
AC_DEFUN([grub_CHECK_PIE],[
|
||
[# Position independent executable.
|
||
pie_possible=yes]
|
||
AC_MSG_CHECKING([whether `$CC' has `-fPIE' as default])
|
||
# Is this a reliable test case?
|
||
AC_LANG_CONFTEST([AC_LANG_SOURCE([[
|
||
#ifdef __PIE__
|
||
int main() {
|
||
return 0;
|
||
}
|
||
#else
|
||
#error NO __PIE__ DEFINED
|
||
#endif
|
||
]])])
|
||
|
||
[# `$CC -c -o ...' might not be portable. But, oh, well... Is calling
|
||
# `ac_compile' like this correct, after all?
|
||
if eval "$ac_compile -S -o conftest.s" 2> /dev/null; then]
|
||
AC_MSG_RESULT([yes])
|
||
[# Should we clear up other files as well, having called `AC_LANG_CONFTEST'?
|
||
rm -f conftest.s
|
||
else
|
||
pie_possible=no]
|
||
AC_MSG_RESULT([no])
|
||
[fi]
|
||
])
|
||
|
||
AC_DEFUN([grub_CHECK_LINK_PIE],[
|
||
[# Position independent executable.
|
||
link_nopie_needed=no]
|
||
AC_MSG_CHECKING([whether linker needs disabling of PIE to work])
|
||
AC_LANG_CONFTEST([AC_LANG_SOURCE([[]])])
|
||
|
||
[if eval "$ac_compile -Wl,-r,-d -nostdlib -Werror -o conftest.o" 2> /dev/null; then]
|
||
AC_MSG_RESULT([no])
|
||
[# Should we clear up other files as well, having called `AC_LANG_CONFTEST'?
|
||
rm -f conftest.o
|
||
else
|
||
link_nopie_needed=yes]
|
||
AC_MSG_RESULT([yes])
|
||
[fi]
|
||
])
|
||
|
||
|
||
dnl Check if the Linker supports `-no-pie'.
|
||
AC_DEFUN([grub_CHECK_NO_PIE],
|
||
[AC_MSG_CHECKING([whether linker accepts -no-pie])
|
||
AC_CACHE_VAL(grub_cv_cc_ld_no_pie,
|
||
[save_LDFLAGS="$LDFLAGS"
|
||
LDFLAGS="$LDFLAGS -no-pie -nostdlib -Werror"
|
||
AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[]])],
|
||
[grub_cv_cc_ld_no_pie=yes],
|
||
[grub_cv_cc_ld_no_pie=no])
|
||
LDFLAGS="$save_LDFLAGS"
|
||
])
|
||
AC_MSG_RESULT([$grub_cv_cc_ld_no_pie])
|
||
nopie_possible=no
|
||
if test "x$grub_cv_cc_ld_no_pie" = xyes ; then
|
||
nopie_possible=yes
|
||
fi
|
||
])
|
||
|
||
AC_DEFUN([grub_CHECK_NO_PIE_ONEWORD],
|
||
[AC_MSG_CHECKING([whether linker accepts -nopie])
|
||
AC_CACHE_VAL(grub_cv_cc_ld_no_pie_oneword,
|
||
[save_LDFLAGS="$LDFLAGS"
|
||
LDFLAGS="$LDFLAGS -nopie -nostdlib -Werror"
|
||
AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[]])],
|
||
[grub_cv_cc_ld_no_pie_oneword=yes],
|
||
[grub_cv_cc_ld_no_pie_oneword=no])
|
||
LDFLAGS="$save_LDFLAGS"
|
||
])
|
||
AC_MSG_RESULT([$grub_cv_cc_ld_no_pie_oneword])
|
||
nopie_oneword_possible=no
|
||
if test "x$grub_cv_cc_ld_no_pie_oneword" = xyes ; then
|
||
nopie_oneword_possible=yes
|
||
fi
|
||
])
|
||
|
||
dnl Check if the C compiler supports `-fPIC'.
|
||
AC_DEFUN([grub_CHECK_PIC],[
|
||
[# Position independent executable.
|
||
pic_possible=yes]
|
||
AC_MSG_CHECKING([whether `$CC' has `-fPIC' as default])
|
||
# Is this a reliable test case?
|
||
AC_LANG_CONFTEST([AC_LANG_SOURCE([[
|
||
#ifdef __PIC__
|
||
int main() {
|
||
return 0;
|
||
}
|
||
#else
|
||
#error NO __PIC__ DEFINED
|
||
#endif
|
||
]])])
|
||
|
||
[# `$CC -c -o ...' might not be portable. But, oh, well... Is calling
|
||
# `ac_compile' like this correct, after all?
|
||
if eval "$ac_compile -S -o conftest.s" 2> /dev/null; then]
|
||
AC_MSG_RESULT([yes])
|
||
[# Should we clear up other files as well, having called `AC_LANG_CONFTEST'?
|
||
rm -f conftest.s
|
||
else
|
||
pic_possible=no]
|
||
AC_MSG_RESULT([no])
|
||
[fi]
|
||
])
|
||
|
||
dnl Create an output variable with the transformed name of a GRUB utility
|
||
dnl program.
|
||
AC_DEFUN([grub_TRANSFORM],[dnl
|
||
AC_SUBST(AS_TR_SH([$1]), [`AS_ECHO([$1]) | sed "$program_transform_name"`])dnl
|
||
])
|