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[PATCH] gcc/configure test for AIX DWARF
- From: David Edelsohn <dje dot gcc at gmail dot com>
- To: GCC Patches <gcc-patches at gcc dot gnu dot org>
- Date: Mon, 18 Jan 2016 14:30:00 -0500
- Subject: [PATCH] gcc/configure test for AIX DWARF
- Authentication-results: sourceware.org; auth=none
AIX7 has added support for DWARF to XCOFF, but complete and correct
support did not occur with a single update and the initial release of
AIX7. The initial support defined a subset of common DWARF debug
sections. A later update added most of the remaining sections for
location lists and frames, but the AIX Assembler did not correctly
handle references to labels generated by GCC.
This patch updates the gcc/configure test for the extended DWARF
support to ensure that the AIX toolchain correctly handles the label
reference.
Bootstrapped on powerpc-ibm-aix7.1.2.0 with and without the corrected assembler.
Okay?
Thanks, David
* configure.ac (gcc_cv_as_dwloc): Test support for debug frame section
label reference.
* configure: Regenerate.
Index: configure.ac
===================================================================
--- configure.ac (revision 232532)
+++ configure.ac (working copy)
@@ -4384,7 +4384,7 @@
case $target in
*-*-aix*)
- gcc_GAS_CHECK_FEATURE([.ref support],
+ gcc_GAS_CHECK_FEATURE([AIX .ref support],
gcc_cv_as_aix_ref, [2,21,0],,
[ .csect stuff[[rw]]
stuff:
@@ -4395,19 +4395,17 @@
[AC_DEFINE(HAVE_AS_REF, 1,
[Define if your assembler supports .ref])])
;;
- esac
- case $target in
- *-*-aix*)
- gcc_GAS_CHECK_FEATURE([dwarf location lists section support],
+ gcc_GAS_CHECK_FEATURE([AIX DWARF location lists section support],
gcc_cv_as_aix_dwloc, [2,21,0],,
- [ .dwsect 0xB0000
+ [ .dwsect 0xA0000
+ Lframe..0:
+ .vbyte 4,Lframe..0:
],,
[AC_DEFINE(HAVE_XCOFF_DWARF_EXTRAS, 1,
- [Define if your assembler supports .dwsect 0xB0000])])
+ [Define if your assembler supports AIX debug frame section
label reference.])])
;;
esac
- ;;
mips*-*-*)
gcc_GAS_CHECK_FEATURE([explicit relocation support],