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# CHECK_FOR_GOLD_T22266
# ----------------------
#
# Test for binutils #22266. This bug manifested as GHC bug #14328 (see also:
# #14675, #14291).
# Uses test from
# https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=033bfb739b525703bfe23f151d09e9beee3a2afe
#
# $1 = linker to test
# Sets $result to 0 if not affected, 1 otherwise
AC_DEFUN([CHECK_FOR_GOLD_T22266],[
AC_MSG_CHECKING([for ld.gold object merging bug (binutils 22266)])
if ! $1 --version | grep -q "GNU gold" 2>/dev/null; then
# Not gold
result=0
elif test "$cross_compiling" = "yes"; then
AC_MSG_RESULT([cross-compiling, assuming LD can merge objects correctly.])
result=0
else
FPTOOLS_WRITE_FILE([conftest.a.c], [
__attribute__((section(".data.a")))
static int int_from_a_1 = 0x11223344;
__attribute__((section(".data.rel.ro.a")))
int *p_int_from_a_2 = &int_from_a_1;
const char *hello (void);
const char *
hello (void)
{
return "XXXHello, world!" + 3;
}
])
FPTOOLS_WRITE_FILE([conftest.main.c], [
#include <stdlib.h>
#include <string.h>
extern int *p_int_from_a_2;
extern const char *hello (void);
int main (void) {
if (*p_int_from_a_2 != 0x11223344)
abort ();
if (strcmp(hello(), "Hello, world!") != 0)
abort ();
return 0;
}
])
FPTOOLS_WRITE_FILE([conftest.t], [
SECTIONS
{
.text : {
*(.text*)
}
.rodata :
{
*(.rodata .rodata.* .gnu.linkonce.r.*)
}
.data.rel.ro : {
*(.data.rel.ro*)
}
.data : {
*(.data*)
}
.bss : {
*(.bss*)
}
}
])
$CC -c -o conftest.a.o conftest.a.c || AC_MSG_ERROR([Failed to compile test])
$MergeObjsCmd $MergeObjsArgs -T conftest.t conftest.a.o -o conftest.ar.o || AC_MSG_ERROR([Failed to merge test object])
$CC -c -o conftest.main.o conftest.main.c || AC_MSG_ERROR([Failed to compile test driver])
$CC conftest.ar.o conftest.main.o -o conftest || AC_MSG_ERROR([Failed to link test driver])
if ./conftest; then
AC_MSG_RESULT([not affected])
result=0
else
AC_MSG_RESULT([affected])
result=1
fi
rm -f conftest.a.o conftest.a.c conttest.ar.o conftest.main.c conftest.main.o conftest
fi
])
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