Fix creation of build directories with non-recursive-gnulib-prefix-hack.

This is necessary for executing "make" in a VPATH build of a package
that uses prefix-gnulib-mk and a module such as alloca-opt.

* modules/alloca-opt (Makefile.am): Before generating the .h-t file,
ensure that the directory in which we want to create it exists.
(configure.ac): Invoke AC_PROG_MKDIR_P.
* modules/argz: Likewise.
* modules/arpa_inet: Likewise.
* modules/assert-h: Likewise.
* modules/byteswap: Likewise.
* modules/configmake: Likewise.
* modules/ctype: Likewise.
* modules/dirent: Likewise.
* modules/dynarray: Likewise.
* modules/errno: Likewise.
* modules/execinfo: Likewise.
* modules/fcntl-h: Likewise.
* modules/float: Likewise.
* modules/fnmatch-h: Likewise.
* modules/getopt-posix: Likewise.
* modules/glob-h: Likewise.
* modules/iconv-h: Likewise.
* modules/ieee754-h: Likewise.
* modules/inttypes-incomplete: Likewise.
* modules/langinfo: Likewise.
* modules/libgmp: Likewise.
* modules/libtextstyle-optional: Likewise.
* modules/limits-h: Likewise.
* modules/locale: Likewise.
* modules/malloc-h: Likewise.
* modules/math: Likewise.
* modules/monetary: Likewise.
* modules/net_if: Likewise.
* modules/netdb: Likewise.
* modules/netinet_in: Likewise.
* modules/openmp-init: Likewise.
* modules/poll-h: Likewise.
* modules/posix-shell: Likewise.
* modules/pthread-h: Likewise.
* modules/pty: Likewise.
* modules/sched: Likewise.
* modules/scratch_buffer: Likewise.
* modules/search: Likewise.
* modules/selinux-h: Likewise.
* modules/signal-h: Likewise.
* modules/sigsegv: Likewise.
* modules/snippet/link-warning: Likewise.
* modules/spawn: Likewise.
* modules/stdalign: Likewise.
* modules/stdarg: Likewise.
* modules/stdbool: Likewise.
* modules/stddef: Likewise.
* modules/stdint: Likewise.
* modules/stdio: Likewise.
* modules/stdlib: Likewise.
* modules/stdnoreturn: Likewise.
* modules/string: Likewise.
* modules/strings: Likewise.
* modules/sys_file: Likewise.
* modules/sys_ioctl: Likewise.
* modules/sys_random: Likewise.
* modules/sys_resource: Likewise.
* modules/sys_select: Likewise.
* modules/sys_socket: Likewise.
* modules/sys_stat: Likewise.
* modules/sys_time: Likewise.
* modules/sys_times: Likewise.
* modules/sys_types: Likewise.
* modules/sys_uio: Likewise.
* modules/sys_utsname: Likewise.
* modules/sys_wait: Likewise.
* modules/sysexits: Likewise.
* modules/termios: Likewise.
* modules/threads-h: Likewise.
* modules/time: Likewise.
* modules/uchar: Likewise.
* modules/unicase/base: Likewise.
* modules/unicase/special-casing: Likewise.
* modules/uniconv/base: Likewise.
* modules/unictype/base: Likewise.
* modules/unigbrk/base: Likewise.
* modules/unilbrk/base: Likewise.
* modules/uniname/base: Likewise.
* modules/uninorm/base: Likewise.
* modules/unistd: Likewise.
* modules/unistdio/base: Likewise.
* modules/unistr/base: Likewise.
* modules/unitypes: Likewise.
* modules/uniwbrk/base: Likewise.
* modules/uniwidth/base: Likewise.
* modules/utime-h: Likewise.
* modules/wchar: Likewise.
* modules/wctype-h: Likewise.
* gnulib-tool (func_emit_lib_Makefile_am): When producing output for
GNU make, eliminate %reldir% tokens.

1 files changed, 2 insertions, 0 deletions

diff --git a/modules/ctype b/modules/ctype
index 60d7d5fb46..4d35c8ae02 100644
--- a/modules/ctype
+++ b/modules/ctype
@@ -14,6 +14,7 @@ snippet/warn-on-use
 configure.ac:
 gl_CTYPE_H
 gl_CTYPE_H_REQUIRE_DEFAULTS
+AC_PROG_MKDIR_P
 
 Makefile.am:
 BUILT_SOURCES += ctype.h
@@ -22,6 +23,7 @@ BUILT_SOURCES += ctype.h
 # doesn't have one that works with the given compiler.
 ctype.h: ctype.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(WARN_ON_USE_H)
 	$(AM_V_GEN)rm -f $@-t $@ && \
+	$(MKDIR_P) '%reldir%' && \
 	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
 	  sed -e 's|@''GUARD_PREFIX''@|${gl_include_guard_prefix}|g' \
 	      -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \