Re: dynarray, scratch_buffer: Avoid conflict with preprocessor macros owned by the system

[Bruno Haible]

Oops, I forgot to 'mkdir -p malloc' in the build directory. In some
environments, the Makefile's 'dirstamp' handling does it automatically;
in others, it doesn't.


2021-06-07  Bruno Haible  <bruno@clisp.org>

        dynarray, scratch_buffer: Fix VPATH builds (regression from yesterday).
        * modules/dynarray (configure.ac): Invoke AC_PROG_MKDIR_P.
        (Makefile.am): Create malloc/ directory before creating
        malloc/dynarray.gl.h and malloc/dynarray-skeleton.gl.h.
        * modules/scratch_buffer (configure.ac): Invoke AC_PROG_MKDIR_P.
        (Makefile.am): Create malloc/ directory before creating
        malloc/scratch_buffer.gl.h.

diff --git a/modules/dynarray b/modules/dynarray
index 7fd444f..fa608de 100644
--- a/modules/dynarray
+++ b/modules/dynarray
@@ -20,11 +20,13 @@ stddef
 intprops
 
 configure.ac:
+AC_PROG_MKDIR_P
 
 Makefile.am:
 BUILT_SOURCES += malloc/dynarray.gl.h malloc/dynarray-skeleton.gl.h
 
 malloc/dynarray.gl.h: malloc/dynarray.h
+       $(AM_V_at)$(MKDIR_P) malloc
        $(AM_V_GEN)rm -f $@-t $@ && \
        { echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
          sed -e '/libc_hidden_proto/d' < $(srcdir)/malloc/dynarray.h; \
@@ -33,6 +35,7 @@ malloc/dynarray.gl.h: malloc/dynarray.h
 MOSTLYCLEANFILES += malloc/dynarray.gl.h malloc/dynarray.gl.h-t
 
 malloc/dynarray-skeleton.gl.h: malloc/dynarray-skeleton.c
+       $(AM_V_at)$(MKDIR_P) malloc
        $(AM_V_GEN)rm -f $@-t $@ && \
        { echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
          sed -e 's|<malloc/dynarray\.h>|<malloc/dynarray.gl.h>|g' \
diff --git a/modules/scratch_buffer b/modules/scratch_buffer
index ede77a9..184f0b6 100644
--- a/modules/scratch_buffer
+++ b/modules/scratch_buffer
@@ -20,11 +20,13 @@ realloc-posix
 free-posix
 
 configure.ac:
+AC_PROG_MKDIR_P
 
 Makefile.am:
 BUILT_SOURCES += malloc/scratch_buffer.gl.h
 
 malloc/scratch_buffer.gl.h: malloc/scratch_buffer.h
+       $(AM_V_at)$(MKDIR_P) malloc
        $(AM_V_GEN)rm -f $@-t $@ && \
        { echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
          sed -e 's|__always_inline|inline _GL_ATTRIBUTE_ALWAYS_INLINE|g' \