https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81968
--- Comment #22 from Richard Biener <rguenth at gcc dot gnu.org> ---
Testcase (takes a bit too long / time for the testsuite):
#define F(i) int F ## i () { return i; }
#define FS(x) F(x ## 0) F(x ## 1) F(x ## 2) F(x ## 3) F(x ## 4) F(x ## 5) F(x
## 6) F(x ## 7) F(x ## 8) F(x ## 9)
#define FS1(x) FS(x ## 0) FS(x ## 1) FS(x ## 2) FS(x ## 3) FS(x ## 4) FS(x ##
5) FS(x ## 6) FS(x ## 7) FS(x ## 8) FS(x ## 9)
#define FS2(x) FS1(x ## 0) FS1(x ## 1) FS1(x ## 2) FS1(x ## 3) FS1(x ## 4)
FS1(x ## 5) FS1(x ## 6) FS1(x ## 7) FS1(x ## 8) FS1(x ## 9)
#define FS3(x) FS2(x ## 0) FS2(x ## 1) FS2(x ## 2) FS2(x ## 3) FS2(x ## 4)
FS2(x ## 5) FS2(x ## 6) FS2(x ## 7) FS2(x ## 8) FS2(x ## 9)
#define FS4(x) FS3(x ## 0) FS3(x ## 1) FS3(x ## 2) FS3(x ## 3) FS3(x ## 4)
FS3(x ## 5) FS3(x ## 6)
FS4(1)
int main() {}
> ./xgcc -B. t.c -flto -g
/tmp/ccfYIkiwdebugobjtem: file not recognized: File format not recognized
collect2: error: ld returned 1 exit status
lto-wrapper: fatal error: ./xgcc returned 1 exit status
compilation terminated.
/usr/lib64/gcc/x86_64-suse-linux/4.8/../../../../x86_64-suse-linux/bin/ld:
error: lto-wrapper failed
collect2: error: ld returned 1 exit status
that's with the attached patch, it seems to work fine without it.
