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* [gcc r11-10383] nvptx: In 'STARTFILE_SPEC', fix 'crt0.o' for '-mmainkernel'
@ 2022-11-19 14:44 Thomas Schwinge
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From: Thomas Schwinge @ 2022-11-19 14:44 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:4805d602d8dd25c10d1d8f30daa8a2eed0aed108
commit r11-10383-g4805d602d8dd25c10d1d8f30daa8a2eed0aed108
Author: Thomas Schwinge <thomas@codesourcery.com>
Date: Fri Nov 18 23:57:52 2022 +0100
nvptx: In 'STARTFILE_SPEC', fix 'crt0.o' for '-mmainkernel'
A recent nvptx-tools change: commit 886a95faf66bf66a82fc0fe7d2a9fd9e9fec2820
"ld: Don't search for input files in '-L'directories" (of
<https://github.com/MentorEmbedded/nvptx-tools/pull/38>
"Match standard 'ld' "search" behavior") in GCC/nvptx target testing
generally causes linking to fail with:
error opening crt0.o
collect2: error: ld returned 1 exit status
compiler exited with status 1
Indeed per GCC '-v' output, there is an undecorated 'crt0.o' on the linker
('collect2') command line:
[...]/build-gcc/./gcc/collect2 -o [...] crt0.o [...]
This is due to:
gcc/config/nvptx/nvptx.h:#define STARTFILE_SPEC "%{mmainkernel:crt0.o}"
..., and the fix, as used by numerous other GCC targets, is to instead use
'crt0.o%s'; for '%s' means, per 'gcc/gcc.cc', "The Specs Language":
%s current argument is the name of a library or startup file of some sort.
Search for that file in a standard list of directories
and substitute the full name found.
With that, we get the expected path to 'crt0.o'.
gcc/
* config/nvptx/nvptx.h (STARTFILE_SPEC): Fix 'crt0.o' for
'-mmainkernel'.
(cherry picked from commit dda43e1ef0c9f6c32ad022d3a08ce7651e42a129)
Diff:
---
gcc/config/nvptx/nvptx.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/gcc/config/nvptx/nvptx.h b/gcc/config/nvptx/nvptx.h
index 3273ad86673..f1965d91fdd 100644
--- a/gcc/config/nvptx/nvptx.h
+++ b/gcc/config/nvptx/nvptx.h
@@ -27,7 +27,7 @@
/* Run-time Target. */
-#define STARTFILE_SPEC "%{mmainkernel:crt0.o}"
+#define STARTFILE_SPEC "%{mmainkernel:crt0.o%s}"
/* Default needs to be in sync with default for misa in nvptx.opt.
We add a default here to work around a hard-coded sm_30 default in
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