This patch is for .GCC.command.line sections in LTO objects to be copied
into the final objects as in the following example:
[egeyar@localhost lto]$ gcc -flto -O3 demo.c -c -g --record-gcc-command-line
[egeyar@localhost lto]$ gcc -flto -O2 demo2.c -c -g --record-gcc-command-line
-DFORTIFY=2
[egeyar@localhost lto]$ gcc demo.o demo2.o -o a.out
[egeyar@localhost lto]$ readelf -p .GCC.command.line a.out
String dump of section '.GCC.command.line':
[ 0] 10.0.1 20200227 (experimental) : gcc -flto -O3 demo.c -c -g
--record-gcc-command-line
[ 56] 10.0.1 20200227 (experimental) : gcc -flto -O2 demo2.c -c -g
--record-gcc-command-line -DFORTIFY=2
Regards
Egeyar
libiberty:
2020-02-27 Egeyar Bagcioglu <egeyar.bagcio...@oracle.com>
* simple-object.c (handle_lto_debug_sections): Name
".GCC.command.line" among debug sections to be copied over
from lto objects.
---
libiberty/simple-object.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/libiberty/simple-object.c b/libiberty/simple-object.c
index d9c648a..3b3ca9c 100644
--- a/libiberty/simple-object.c
+++ b/libiberty/simple-object.c
@@ -298,6 +298,9 @@ handle_lto_debug_sections (const char *name, int rename)
COMDAT sections in objects produced by GCC. */
else if (strcmp (name, ".comment") == 0)
return strcpy (newname, name);
+ /* Copy over .GCC.command.line section under the same name if present. */
+ else if (strcmp (name, ".GCC.command.line") == 0)
+ return strcpy (newname, name);
free (newname);
return NULL;
}
--
1.8.3.1
