[bug-gettext] [bug #56109] many autoconf tests produce wrong results with CC="gcc -flto"

[Bruno Haible]

Update of bug #56109 (project gettext):

                  Status:               Confirmed => Fixed                  
             Open/Closed:                    Open => Closed                 

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Follow-up Comment #20:

Fixed in gnulib through this commit:
https://git.savannah.gnu.org/gitweb/?p=gnulib.git;a=commitdiff;h=bdf8b1d2b74e12648edafffcda43832bc35e3d1f

However, building gettext with CC="gcc -fto" does still not work, because of
an issue in libtool: libtool's _LT_CMD_GLOBAL_SYMBOLS cannot determine
lt_cv_sys_global_symbol_pipe in this situation, because 'nm' does not work on
object files. Test case:

conftest.c:

char nm_test_var;
void nm_test_func(void);
void nm_test_func(void){}
int main(){nm_test_var='a';nm_test_func();return(0);}



$ gcc -flto -O2 -c conftest.c ; nm conftest.o
nm: conftest.o: plugin needed to handle lto object
0000000000000001 C __gnu_lto_slim
0000000000000001 C __gnu_lto_v1


Feel free to report this to the binutils people.

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