http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52223
Bug #: 52223 Summary: [4.5,4.6,4.7 regression] libffi's man page install breaks with multilibs and overridden mandir Classification: Unclassified Product: gcc Version: 4.7.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: libffi AssignedTo: unassig...@gcc.gnu.org ReportedBy: mi...@it.uu.se libffi installs three man pages during 'make install'. If a) the target has multilibs enabled, and b) the configure-time --mandir= is overridden by make install with mandir=, then libffi's man page install step in its multilib subdirs will ignore the overridden mandir and use the configure-time mandir instead, which may clobber an unexpected destination, or may cause the entire install to fail if that destination isn't currently writable by the user. The problem reproduces easily on x86_64-linux: /path/to/gcc-4.7/configure --prefix=/usr --mandir=/usr/share/man --enable-languages=c,c++,java --enable-multilib make # the following must be done as a regular user with no write access to # /usr/share/man make prefix=/tmp/buildroot/usr mandir=/tmp/buildroot/usr/share/man install ... Making install in man make[5]: Entering directory `/tmp/objdir/x86_64-unknown-linux-gnu/32/libffi/man' make[6]: Entering directory `/tmp/objdir/x86_64-unknown-linux-gnu/32/libffi/man' make[6]: Nothing to be done for `install-exec-am'. test -z "/usr/share/man/man3" || /bin/mkdir -p "/usr/share/man/man3" /usr/bin/install -c -m 644 /tmp/gcc-4.7-20120211/libffi/man/ffi.3 /tmp/gcc-4.7-20120211/libffi/man/ffi_call.3 /tmp/gcc-4.7-20120211/libffi/man/ffi_prep_cif.3 '/usr/share/man/man3' /usr/bin/install: cannot create regular file `/usr/share/man/man3/ffi.3': Permission denied /usr/bin/install: cannot create regular file `/usr/share/man/man3/ffi_call.3': Permission denied /usr/bin/install: cannot create regular file `/usr/share/man/man3/ffi_prep_cif.3': Permission denied make[6]: *** [install-man3] Error 1 make[6]: Leaving directory `/tmp/objdir/x86_64-unknown-linux-gnu/32/libffi/man' make[5]: *** [install-am] Error 2 make[5]: Leaving directory `/tmp/objdir/x86_64-unknown-linux-gnu/32/libffi/man' make[4]: *** [install-recursive] Error 1 make[4]: Leaving directory `/tmp/objdir/x86_64-unknown-linux-gnu/32/libffi' make[3]: *** [multi-do] Error 1 make[3]: Leaving directory `/tmp/objdir/x86_64-unknown-linux-gnu/libffi' make[2]: *** [install-multi] Error 2 make[2]: Leaving directory `/tmp/objdir/x86_64-unknown-linux-gnu/libffi' make[1]: *** [install-target-libffi] Error 2 make[1]: Leaving directory `/tmp/objdir' make: *** [install] Error 2 If multilibs are disabled then the man-page install step does use the overridden mandir=, but that clearly isn't a solution when multilibs are essential. I currently work around it by patching libffi's makefiles to delete "man" from "SUBDIRS". The problem is present in 4.5, 4.6, and 4.7, for (at least) x86_64-linux and m68k-linux. 4.4 did not have those man pages or this problem. The build procedure (configure with --prefix= and --mandir= pointing to system directories, but make install with prefix= and mandir= pointing to a local staging area) is taken verbatim from Fedora's gcc src rpm, so I'm assuming it's something that should work.