* libnosys/acconfig.h (HAVE_SECTION_ATTRIBUTES): New macro.
* libnosys/configure.in: Check gcc's support for section attributes. * libnosys/warning.h: Have link_warning expand to nothing if gcc does not support section attributes.
This commit is contained in:
Thomas Fitzsimmons
parent
7124f04eb8
commit
558ab81ed1
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@ -1,3 +1,10 @@
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2002-05-11 Thomas Fitzsimmons <fitzsim@redhat.com>
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* libnosys/acconfig.h (HAVE_SECTION_ATTRIBUTES): New macro.
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* libnosys/configure.in: Check gcc's support for section attributes.
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* libnosys/warning.h: Have link_warning expand to nothing if gcc
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does not support section attributes.
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2002-04-22 Jonathan Larmour <jlarmour@redhat.com>
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* arm/syscall.h: New file. To define extra syscall values for RedBoot.
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@ -19,5 +19,8 @@
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/* .pushsection/.popsection directives allowed */
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#undef HAVE_ASM_POPSECTION_DIRECTIVE
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/* support for section attributes */
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#undef HAVE_SECTION_ATTRIBUTES
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/* symbol prefix */
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#undef __SYMBOL_PREFIX
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@ -15,5 +15,8 @@
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/* .pushsection/.popsection directives allowed */
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#undef HAVE_ASM_POPSECTION_DIRECTIVE
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/* support for section attributes */
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#undef HAVE_SECTION_ATTRIBUTES
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/* symbol prefix */
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#undef __SYMBOL_PREFIX
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@ -831,43 +831,63 @@ EOF
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#define HAVE_ASM_PREVIOUS_DIRECTIVE 1
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EOF
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else
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rm -f conftest*
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fi
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rm -f conftest*
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fi
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echo "$ac_t""$libc_cv_asm_previous_directive" 1>&6
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echo $ac_n "checking for .popsection assembler directive""... $ac_c" 1>&6
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echo "configure:841: checking for .popsection assembler directive" >&5
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echo $ac_n "checking for .popsection assembler directive""... $ac_c" 1>&6
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echo "configure:842: checking for .popsection assembler directive" >&5
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if eval "test \"`echo '$''{'libc_cv_asm_popsection_directive'+set}'`\" = set"; then
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echo $ac_n "(cached) $ac_c" 1>&6
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else
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cat > conftest.s <<EOF
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cat > conftest.s <<EOF
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.pushsection foo_section
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.popsection
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EOF
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if { ac_try='${CC-cc} -c $CFLAGS conftest.s 1>&5'; { (eval echo configure:849: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; }; then
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cat >> confdefs.h <<\EOF
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if { ac_try='${CC-cc} -c $CFLAGS conftest.s 1>&5'; { (eval echo configure:850: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; }; then
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cat >> confdefs.h <<\EOF
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#define HAVE_ASM_POPSECTION_DIRECTIVE 1
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EOF
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fi
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fi
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rm -f conftest*
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fi
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echo "$ac_t""$libc_cv_asm_popsection_directive" 1>&6
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;;
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echo $ac_n "checking for section attributes""... $ac_c" 1>&6
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echo "configure:862: checking for section attributes" >&5
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if eval "test \"`echo '$''{'libc_cv_section_attributes'+set}'`\" = set"; then
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echo $ac_n "(cached) $ac_c" 1>&6
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else
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cat > conftest.c <<EOF
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int secttest __attribute__ ((section (".gnu.warning.secttest"))) = 10;
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int main() {}
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EOF
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if { ac_try='${CC-cc} -c $CFLAGS conftest.c 1>&5'; { (eval echo configure:870: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; }; then
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cat >> confdefs.h <<\EOF
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#define HAVE_SECTION_ATTRIBUTES 1
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EOF
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fi
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rm -f conftest*
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fi
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echo "$ac_t""$libc_cv_section_attributes" 1>&6
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;;
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esac
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echo $ac_n "checking for function prefix""... $ac_c" 1>&6
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echo "configure:864: checking for function prefix" >&5
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echo "configure:884: checking for function prefix" >&5
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if eval "test \"`echo '$''{'libc_dollar_prefix'+set}'`\" = set"; then
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echo $ac_n "(cached) $ac_c" 1>&6
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else
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cat > conftest.c <<\EOF
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foo () { }
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EOF
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if { ac_try='${CC-cc} -S conftest.c -o - | fgrep "\$foo" > /dev/null'; { (eval echo configure:871: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; };
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if { ac_try='${CC-cc} -S conftest.c -o - | fgrep "\$foo" > /dev/null'; { (eval echo configure:891: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; };
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then
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libc_dollar_prefix=yes
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else
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@ -892,7 +912,7 @@ fi
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# Extract the first word of "gcc", so it can be a program name with args.
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set dummy gcc; ac_word=$2
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echo $ac_n "checking for $ac_word""... $ac_c" 1>&6
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echo "configure:896: checking for $ac_word" >&5
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echo "configure:916: checking for $ac_word" >&5
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if eval "test \"`echo '$''{'ac_cv_prog_CC'+set}'`\" = set"; then
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echo $ac_n "(cached) $ac_c" 1>&6
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else
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@ -922,7 +942,7 @@ if test -z "$CC"; then
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# Extract the first word of "cc", so it can be a program name with args.
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set dummy cc; ac_word=$2
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echo $ac_n "checking for $ac_word""... $ac_c" 1>&6
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echo "configure:926: checking for $ac_word" >&5
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echo "configure:946: checking for $ac_word" >&5
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if eval "test \"`echo '$''{'ac_cv_prog_CC'+set}'`\" = set"; then
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echo $ac_n "(cached) $ac_c" 1>&6
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else
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@ -971,7 +991,7 @@ fi
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fi
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echo $ac_n "checking whether we are using GNU C""... $ac_c" 1>&6
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echo "configure:975: checking whether we are using GNU C" >&5
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echo "configure:995: checking whether we are using GNU C" >&5
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if eval "test \"`echo '$''{'ac_cv_prog_gcc'+set}'`\" = set"; then
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echo $ac_n "(cached) $ac_c" 1>&6
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else
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@ -980,7 +1000,7 @@ else
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yes;
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#endif
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EOF
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if { ac_try='${CC-cc} -E conftest.c'; { (eval echo configure:984: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; } | egrep yes >/dev/null 2>&1; then
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if { ac_try='${CC-cc} -E conftest.c'; { (eval echo configure:1004: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; } | egrep yes >/dev/null 2>&1; then
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ac_cv_prog_gcc=yes
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else
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ac_cv_prog_gcc=no
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@ -995,7 +1015,7 @@ if test $ac_cv_prog_gcc = yes; then
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ac_save_CFLAGS="$CFLAGS"
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CFLAGS=
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echo $ac_n "checking whether ${CC-cc} accepts -g""... $ac_c" 1>&6
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echo "configure:999: checking whether ${CC-cc} accepts -g" >&5
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echo "configure:1019: checking whether ${CC-cc} accepts -g" >&5
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if eval "test \"`echo '$''{'ac_cv_prog_cc_g'+set}'`\" = set"; then
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echo $ac_n "(cached) $ac_c" 1>&6
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else
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@ -1031,7 +1051,7 @@ LD=${LD-ld}
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# Extract the first word of "ranlib", so it can be a program name with args.
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set dummy ranlib; ac_word=$2
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echo $ac_n "checking for $ac_word""... $ac_c" 1>&6
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echo "configure:1035: checking for $ac_word" >&5
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echo "configure:1055: checking for $ac_word" >&5
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if eval "test \"`echo '$''{'ac_cv_prog_RANLIB'+set}'`\" = set"; then
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echo $ac_n "(cached) $ac_c" 1>&6
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else
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@ -1232,7 +1252,7 @@ cat >> $CONFIG_STATUS <<\EOF
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# Split the substitutions into bite-sized pieces for seds with
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# small command number limits, like on Digital OSF/1 and HP-UX.
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ac_max_sed_cmds=90 # Maximum number of lines to put in a sed script.
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ac_max_sed_cmds=60 # Maximum number of lines to put in a sed script.
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ac_file=1 # Number of current file.
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ac_beg=1 # First line for current file.
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ac_end=$ac_max_sed_cmds # Line after last line for current file.
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@ -136,27 +136,38 @@ case "${target}" in
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AC_DEFINE(HAVE_ELF)
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AC_CACHE_CHECK(for .previous assembler directive,
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libc_cv_asm_previous_directive, [dnl
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libc_cv_asm_previous_directive, [dnl
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cat > conftest.s <<EOF
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.section foo_section
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.previous
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EOF
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if AC_TRY_COMMAND(${CC-cc} -c $CFLAGS conftest.s 1>&AC_FD_CC); then
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AC_DEFINE(HAVE_ASM_PREVIOUS_DIRECTIVE)
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else
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rm -f conftest*])
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AC_CACHE_CHECK(for .popsection assembler directive,
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fi
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rm -f conftest*])
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AC_CACHE_CHECK(for .popsection assembler directive,
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libc_cv_asm_popsection_directive, [dnl
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cat > conftest.s <<EOF
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cat > conftest.s <<EOF
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.pushsection foo_section
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.popsection
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EOF
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if AC_TRY_COMMAND(${CC-cc} -c $CFLAGS conftest.s 1>&AC_FD_CC); then
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AC_DEFINE(HAVE_ASM_POPSECTION_DIRECTIVE)
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fi
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if AC_TRY_COMMAND(${CC-cc} -c $CFLAGS conftest.s 1>&AC_FD_CC); then
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AC_DEFINE(HAVE_ASM_POPSECTION_DIRECTIVE)
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fi
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rm -f conftest*])
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;;
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AC_CACHE_CHECK(for section attributes,
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libc_cv_section_attributes, [dnl
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cat > conftest.c <<EOF
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int secttest __attribute__ ((section (".gnu.warning.secttest"))) = 10;
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int main() {}
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EOF
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if AC_TRY_COMMAND(${CC-cc} -c $CFLAGS conftest.c 1>&AC_FD_CC); then
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AC_DEFINE(HAVE_SECTION_ATTRIBUTES)
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fi
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rm -f conftest*])
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;;
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esac
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AC_CACHE_CHECK(for function prefix, libc_dollar_prefix, [dnl
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@ -15,10 +15,14 @@
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# define __make_section_unallocated(section_string)
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# endif
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# define link_warning(symbol, msg) \
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# ifdef HAVE_SECTION_ATTRIBUTES
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# define link_warning(symbol, msg) \
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__make_section_unallocated (".gnu.warning." #symbol) \
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static const char __evoke_link_warning_##symbol[] \
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__attribute__ ((section (".gnu.warning." #symbol))) = msg;
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# else
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# define link_warning(symbol, msg)
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# endif
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#else /* !ELF */
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