[gcc r12-8556] libstdc++: Add missing prerequisite to generated header [PR106162]

[Jonathan Wakely]

https://gcc.gnu.org/g:ce5b1c3b95f7136c963d31673ca83f7392c40a53

commit r12-8556-gce5b1c3b95f7136c963d31673ca83f7392c40a53
Author: Jonathan Wakely <jwakely@redhat.com>
Date:   Fri Jul 1 22:23:43 2022 +0100

    libstdc++: Add missing prerequisite to generated header [PR106162]
    
    The ${host_builddir}/largefile-config.h header can't be written until
    its parent directory has been created, so it needs to have the creation
    of that directory as a prerequisite.
    
    libstdc++-v3/ChangeLog:
    
            PR libstdc++/106162
            * include/Makefile.am (largefile-config.h): Add
            stamp-${host_alias} prerequisite.
            * include/Makefile.in: Regenerate.
    
    (cherry picked from commit 8a6ee426c2be3bd4359520e02c00ec60cac2fece)

Diff:
---
 libstdc++-v3/include/Makefile.am | 2 +-
 libstdc++-v3/include/Makefile.in | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/libstdc++-v3/include/Makefile.am b/libstdc++-v3/include/Makefile.am
index 77eea7d61e8..7708f4cf6c5 100644
--- a/libstdc++-v3/include/Makefile.am
+++ b/libstdc++-v3/include/Makefile.am
@@ -1285,7 +1285,7 @@ stamp-float128:
 endif
 
 # This header is not installed, it's only used to build libstdc++ itself.
-${host_builddir}/largefile-config.h: ${CONFIG_HEADER}
+${host_builddir}/largefile-config.h: ${CONFIG_HEADER} stamp-${host_alias}
 	@rm -f $@.tmp
 	@-grep 'define _DARWIN_USE_64_BIT_INODE' ${CONFIG_HEADER} >> $@.tmp
 	@-grep 'define _FILE_OFFSET_BITS' ${CONFIG_HEADER} >> $@.tmp
diff --git a/libstdc++-v3/include/Makefile.in b/libstdc++-v3/include/Makefile.in
index 01bf3e0eb32..7023c2de23e 100644
--- a/libstdc++-v3/include/Makefile.in
+++ b/libstdc++-v3/include/Makefile.in
@@ -1779,7 +1779,7 @@ stamp-host: ${host_headers} ${bits_host_headers} ${ext_host_headers} ${host_head
 @ENABLE_FLOAT128_FALSE@	echo 'undef _GLIBCXX_USE_FLOAT128' > stamp-float128
 
 # This header is not installed, it's only used to build libstdc++ itself.
-${host_builddir}/largefile-config.h: ${CONFIG_HEADER}
+${host_builddir}/largefile-config.h: ${CONFIG_HEADER} stamp-${host_alias}
 	@rm -f $@.tmp
 	@-grep 'define _DARWIN_USE_64_BIT_INODE' ${CONFIG_HEADER} >> $@.tmp
 	@-grep 'define _FILE_OFFSET_BITS' ${CONFIG_HEADER} >> $@.tmp