[Bug lto/89896] -flto=4 is confused by presence of 'all.c' in a local directory. -flto=1 is not.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89896 Richard Biener changed: What|Removed |Added Status|ASSIGNED|RESOLVED Known to work||7.4.1, 8.3.1, 9.0 Resolution|--- |FIXED Known to fail||7.4.0, 8.3.0 --- Comment #9 from Richard Biener --- Fixed.
[Bug lto/89896] -flto=4 is confused by presence of 'all.c' in a local directory. -flto=1 is not.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89896 --- Comment #10 from Richard Biener --- Author: rguenth Date: Wed Apr 3 08:47:19 2019 New Revision: 270114 URL: https://gcc.gnu.org/viewcvs?rev=270114=gcc=rev Log: 2019-04-03 Richard Biener PR lto/89896 * lto-wrapper.c (run_gcc): Avoid implicit rules making the all target phony. Modified: branches/gcc-7-branch/gcc/ChangeLog branches/gcc-7-branch/gcc/lto-wrapper.c
[Bug lto/89896] -flto=4 is confused by presence of 'all.c' in a local directory. -flto=1 is not.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89896 --- Comment #8 from Richard Biener --- Author: rguenth Date: Wed Apr 3 08:46:35 2019 New Revision: 270113 URL: https://gcc.gnu.org/viewcvs?rev=270113=gcc=rev Log: 2019-04-03 Richard Biener PR lto/89896 * lto-wrapper.c (run_gcc): Avoid implicit rules making the all target phony. Modified: branches/gcc-8-branch/gcc/ChangeLog branches/gcc-8-branch/gcc/lto-wrapper.c
[Bug lto/89896] -flto=4 is confused by presence of 'all.c' in a local directory. -flto=1 is not.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89896 --- Comment #7 from Richard Biener --- Author: rguenth Date: Wed Apr 3 08:46:00 2019 New Revision: 270112 URL: https://gcc.gnu.org/viewcvs?rev=270112=gcc=rev Log: 2019-04-03 Richard Biener PR lto/89896 * lto-wrapper.c (run_gcc): Avoid implicit rules making the all target phony. Modified: trunk/gcc/ChangeLog trunk/gcc/lto-wrapper.c
[Bug lto/89896] -flto=4 is confused by presence of 'all.c' in a local directory. -flto=1 is not.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89896 --- Comment #6 from Andreas Schwab --- Just make the target .PHONY.
[Bug lto/89896] -flto=4 is confused by presence of 'all.c' in a local directory. -flto=1 is not.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89896 Richard Biener changed: What|Removed |Added Status|NEW |ASSIGNED Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot gnu.org
[Bug lto/89896] -flto=4 is confused by presence of 'all.c' in a local directory. -flto=1 is not.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89896 H.J. Lu changed: What|Removed |Added Status|ASSIGNED|NEW Assignee|rguenth at gcc dot gnu.org |unassigned at gcc dot gnu.org --- Comment #5 from H.J. Lu --- $ gcc -shared -fPIC -flto=4 -o x.so isl.o -v ... make -f /tmp/ccj2DsQs.mk -j4 all ^^^ ... /usr/local/bin/ld: /usr/lib/gcc/x86_64-redhat-linux/8/../../../../lib64/../lib64/crt1.o: in function `_start': (.text+0x24): undefined reference to `main' collect2: error: ld returned 1 exit status make: *** [: all] Error 1 lto-wrapper: fatal error: make returned 2 exit status Since all.c matches the target "all", make tries to create "all".
[Bug lto/89896] -flto=4 is confused by presence of 'all.c' in a local directory. -flto=1 is not.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89896
--- Comment #4 from Richard Biener ---
Index: gcc/lto-wrapper.c
===
--- gcc/lto-wrapper.c (revision 270053)
+++ gcc/lto-wrapper.c (working copy)
@@ -1671,7 +1671,7 @@ cont:
int j = ltrans_priorities[i*2 + 1];
fprintf (mstream, " \\\n\t%s", output_names[j]);
}
- fprintf (mstream, "\n");
+ fprintf (mstream, "\n\t@:\n");
fclose (mstream);
if (!jobserver)
{
fixes this, adding an empty rule to the all target:
/tmp/ccZYd6M0.ltrans0.ltrans.o:
@gcc-8 '-xlto' '-c' '-fno-openmp' '-fno-openacc' '-mtune=generic'
'-march=x86-64' '-fPIC' '-shared' '-fPIC' '-B' '/abuild/rguenther/trunk2-g/gcc'
'-v' '-save-temps' '-mtune=generic' '-march=x86-64'
'-fltrans-output-list=/tmp/ccZYd6M0.ltrans.out' '-fltrans' '-o'
'/tmp/ccZYd6M0.ltrans0.ltrans.o' '/tmp/ccZYd6M0.ltrans0.o'
all: \
/tmp/ccZYd6M0.ltrans0.ltrans.o
@:
[Bug lto/89896] -flto=4 is confused by presence of 'all.c' in a local directory. -flto=1 is not.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89896
Richard Biener changed:
What|Removed |Added
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot
gnu.org
--- Comment #3 from Richard Biener ---
It seems to be make looking for all.c via the LTRANS makefile and us
invoking make -f /tmp/ccfGbAMc.mk -j2 all
/tmp/cczwBPXD.ltrans0.ltrans.o:
@gcc-8 '-xlto' '-c' '-fno-openmp' '-fno-openacc' '-mtune=generic'
'-march=x86-64' '-fPIC' '-shared' '-fPIC' '-v' '-save-temps' '-mtune=generic'
'-march=x86-64' '-fltrans-output-list=/tmp/cczwBPXD.ltrans.out' '-fltrans' '-o'
'/tmp/cczwBPXD.ltrans0.ltrans.o' '/tmp/cczwBPXD.ltrans0.o'
all: \
/tmp/cczwBPXD.ltrans0.ltrans.o
which eventually leads to
4924 execve("/usr/bin/cc", ["cc", "all.c", "/tmp/cczwBPXD.ltrans0.ltrans.o",
"-o", "all"], [/* 107 vars */]) = 0
if you make all.c invalid C then you see
> gcc-8 -shared -fPIC -flto=2 -x c t.c
all.c:1:1: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ at end of
input
invalid
^~~
make: *** [all] Error 1
lto-wrapper: fatal error: make returned 2 exit status
compilation terminated.
[Bug lto/89896] -flto=4 is confused by presence of 'all.c' in a local directory. -flto=1 is not.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89896 Martin Liška changed: What|Removed |Added Status|UNCONFIRMED |NEW Last reconfirmed||2019-04-01 CC||hjl.tools at gmail dot com, ||hubicka at gcc dot gnu.org Ever confirmed|0 |1 --- Comment #2 from Martin Liška --- Confirmed, minimal reproducer: $ echo "" | gcc -shared -fPIC -flto=2 -x c - /usr/lib64/gcc/x86_64-suse-linux/8/../../../../x86_64-suse-linux/bin/ld: /usr/lib64/gcc/x86_64-suse-linux/8/../../../../lib64/../lib64/crt1.o: in function `_start': /home/abuild/rpmbuild/BUILD/glibc-2.29/csu/../sysdeps/x86_64/start.S:104: undefined reference to `main' collect2: error: ld returned 1 exit status make: *** [: all] Error 1 lto-wrapper: fatal error: make returned 2 exit status compilation terminated. /usr/lib64/gcc/x86_64-suse-linux/8/../../../../x86_64-suse-linux/bin/ld: error: lto-wrapper failed collect2: error: ld returned 1 exit status Looks to me a LD issue. @H.J. can you please take a look?
[Bug lto/89896] -flto=4 is confused by presence of 'all.c' in a local directory. -flto=1 is not.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89896 Sergei Trofimovich changed: What|Removed |Added Summary|-flto=4 is confused by |-flto=4 is confused by |presence of all.o in a |presence of 'all.c' in a |local directory. -flto=1 is |local directory. -flto=1 is |not.|not. --- Comment #1 from Sergei Trofimovich --- It seems that 'all.c' is actual trigger, not 'all.o'.
