hi, we noticed behaviour change in Fedora 25 gcc wrt -Wp option. We use following command line to generate the dependency file: gcc -Wp,-MD,krava,-MT,krava -c -o ex.o ex.c and we get 'krava' file with: krava: ex.c /usr/include/stdc-predef.h /usr/include/stdio.h \ But when we split -Wp option into 2 -Wp options like: gcc -Wp,-MD,krava -Wp,MT,krava -c -o ex.o ex.c we get: ex.o krava: ex.c /usr/include/stdc-predef.h /usr/include/stdio.h \ notice the extra 'ex.o' target. We see this behaviour in Fedora 25. It's ok in Fedora 24, which seems odd because both have same gcc version 6.2.1. Please check full output below. Any idea? thanks for help, jirka --- Fedora 25: [root@intel-denlow-r-02 ~]# gcc -o ex.o -c -Wp,-MD,krava -Wp,-MT,krava -g ex.c [root@intel-denlow-r-02 ~]# cat krava ex.o krava: ex.c /usr/include/stdc-predef.h /usr/include/stdio.h \ /usr/include/features.h /usr/include/sys/cdefs.h \ /usr/include/bits/wordsize.h /usr/include/gnu/stubs.h \ /usr/include/gnu/stubs-64.h \ /usr/lib/gcc/x86_64-redhat-linux/6.2.1/include/stddef.h \ /usr/include/bits/types.h /usr/include/bits/typesizes.h \ /usr/include/libio.h /usr/include/_G_config.h /usr/include/wchar.h \ /usr/lib/gcc/x86_64-redhat-linux/6.2.1/include/stdarg.h \ /usr/include/bits/stdio_lim.h /usr/include/bits/sys_errlist.h [root@intel-denlow-r-02 ~]# gcc -o ex.o -c -Wp,-MD,krava,-MT,krava -g ex.c [root@intel-denlow-r-02 ~]# cat krava krava: ex.c /usr/include/stdc-predef.h /usr/include/stdio.h \ /usr/include/features.h /usr/include/sys/cdefs.h \ /usr/include/bits/wordsize.h /usr/include/gnu/stubs.h \ /usr/include/gnu/stubs-64.h \ /usr/lib/gcc/x86_64-redhat-linux/6.2.1/include/stddef.h \ /usr/include/bits/types.h /usr/include/bits/typesizes.h \ /usr/include/libio.h /usr/include/_G_config.h /usr/include/wchar.h \ /usr/lib/gcc/x86_64-redhat-linux/6.2.1/include/stdarg.h \ /usr/include/bits/stdio_lim.h /usr/include/bits/sys_errlist.h Fedora 24: [jolsa@krava trash]$ gcc -o ex.o -c -Wp,-MD,krava -Wp,-MT,krava -g ex.c [jolsa@krava trash]$ cat krava krava: ex.c /usr/include/stdc-predef.h /usr/include/stdio.h \ /usr/include/features.h /usr/include/sys/cdefs.h \ /usr/include/bits/wordsize.h /usr/include/gnu/stubs.h \ /usr/include/gnu/stubs-64.h \ /usr/lib/gcc/x86_64-redhat-linux/6.2.1/include/stddef.h \ /usr/include/bits/types.h /usr/include/bits/typesizes.h \ /usr/include/libio.h /usr/include/_G_config.h /usr/include/wchar.h \ /usr/lib/gcc/x86_64-redhat-linux/6.2.1/include/stdarg.h \ /usr/include/bits/stdio_lim.h /usr/include/bits/sys_errlist.h [jolsa@krava trash]$ gcc -o ex.o -c -Wp,-MD,krava-Wp,-MT,krava -g ex.c [jolsa@krava trash]$ cat krava krava: ex.c /usr/include/stdc-predef.h /usr/include/stdio.h \ /usr/include/features.h /usr/include/sys/cdefs.h \ /usr/include/bits/wordsize.h /usr/include/gnu/stubs.h \ /usr/include/gnu/stubs-64.h \ /usr/lib/gcc/x86_64-redhat-linux/6.2.1/include/stddef.h \ /usr/include/bits/types.h /usr/include/bits/typesizes.h \ /usr/include/libio.h /usr/include/_G_config.h /usr/include/wchar.h \ /usr/lib/gcc/x86_64-redhat-linux/6.2.1/include/stdarg.h \ /usr/include/bits/stdio_lim.h /usr/include/bits/sys_errlist.h
