https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104895
--- Comment #2 from Christoph Müllner <christophm30 at gmail dot com> ---
Further analysis shows that '-flto=1' works as well and '-flto=16' fails as
well.
This brings us right to the spot:
Bad:
[...]
make -f /tmp/ccyzs8VX.mk -j16 all
Using built-in specs.
[...]
Good:
[...]
gcc @/tmp/cclqDb0Y
Using built-in specs.
[...]
Let's look deeper:
$ mkdir tmpdir
$ export TEMP=$(pwd)/tmpdir/
$ gcc -v -fPIC -flto=16 -shared -Wl,-soname,"lib'do it'.so" -o "lib'do it'.so"
doit.o -save-temps
$ cat tmpdir/ccM8aNK8.mk
./lib'do it'.so.ltrans0.ltrans.o:
@gcc '-xlto' '-c' '-fno-openmp' '-fno-openacc' '-fcf-protection=none'
'-mtune=generic' '-march=x86-64' '-fPIC' '-v' '-fPIC' '-shared' '-save-temps'
'-mtune=generic' '-march=x86-64' '-dumpdir' 'lib'do it'.so.' '-dumpbase'
'./lib'do it'.so.ltrans0.ltrans' '-fltrans' '-o' './lib'do
it'.so.ltrans0.ltrans.o' './lib'do it'.so.ltrans0.o'
.PHONY: all
all: \
./lib'do it'.so.ltrans0.ltrans.o
The invocation of GCC will be:
gcc '-xlto' '-c' '-fno-openmp' '-fno-openacc' '-fcf-protection=none'
'-mtune=generic' '-march=x86-64' '-fPIC' '-v' '-fPIC' '-save-temps' '-shared'
'-mtune=generic' '-march=x86-64' '-dumpdir' 'libdon't do it.so.' '-dumpbase'
'./libdon't do it.so.ltrans0.ltrans' '-fltrans' '-o' './libdon't do
it.so.ltrans0.ltrans.o' './libdon't do it.so.ltrans0.o'
And here we see the issue!
The options are each quoted with '-characters. But the filename itself contains
these characters as well, which will terminate the string. The space between
the '-characters will therefore be interpreted as a separator.
One thing to mention is that GNU Make has limitations how to handle spaces:
http://savannah.gnu.org/bugs/?712
