https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121458
Bug ID: 121458
Summary: HAVE_LD_SOL2_EMULATION check broken
Product: gcc
Version: 16.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: sjames at gcc dot gnu.org
CC: ro at gcc dot gnu.org
Target Milestone: ---
In gcc/configure.ac:
```
# In binutils 2.21, GNU ld gained support for new emulations fully
# supporting the Solaris 2 ABI. Detect their presence in the linker used.
AC_CACHE_CHECK(linker *_sol2 emulation support,
gcc_cv_ld_sol2_emulation,
[gcc_cv_ld_sol2_emulation=no
if test $in_tree_ld = yes ; then
if test "$gcc_cv_gld_major_version" -eq 2 -a \
"$gcc_cv_gld_minor_version" -ge 21 -o \
"$gcc_cv_gld_major_version" -gt 2 \
&& test $in_tree_ld_is_elf = yes; then
gcc_cv_ld_sol2_emulation=yes
fi
elif test x$gcc_cv_ld != x; then
if $gcc_cv_ld -V 2>/dev/null | sed -e '1,/Supported emulations/d;q' | \
grep _sol2 > /dev/null; then
gcc_cv_ld_sol2_emulation=yes
fi
fi])
if test x"$gcc_cv_ld_sol2_emulation" = xyes; then
AC_DEFINE(HAVE_LD_SOL2_EMULATION, 1,
[Define if your linker supports the *_sol2 emulations.])
fi
```
This is broken for me on x86_64-pc-linux-gnu with binutils trunk at least
(surely a long time though) and --enable-targets=all:
$ ld -V 2>/dev/null | sed -e '1,/Supported emulations/d;q'
aix5ppc
$ ld -V 2>/dev/null | grep _sol2
elf32_sparc_sol2
elf_i386_sol2
elf64_sparc_sol2
elf_x86_64_sol2
We shouldn't assume the output ordering is sorted like that. This leads to
gcc_cv_ld_sol2_emulation=no.
(Admittedly, I have no idea how much this matters in practice. I suspect not at
all, but if the check *did* work, we could use it to fix PR121457.)
