[Bug bootstrap/102675] [12 regression] Bootstrap fails in libsanitizer: 'MD5_DIGEST_STRING_LENGTH' was not declared in this scope

[unlvsur at live dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102675

--- Comment #19 from cqwrteur <unlvsur at live dot com> ---
(In reply to Jakub Jelinek from comment #17)
> The include/md5.h part of this has been committed as
> r12-4936-g44d9d55c6d0e3a1e26427662d30f350a80282634
> The other change hasn't been applied from what I can see.
> 
> I wonder if we couldn't do instead:
> 2021-11-16  Jakub Jelinek  <jakub@redhat.com>
> 
> 	PR bootstrap/102675
> 	* sanitizer_common/Makefile.am: Use -DUSE_SYSTEM_MD5 in AM_CXXFLAGS
> 	of sanitizer_platform_limits_freebsd.cpp.
> 	* sanitizer_common/Makefile.in: Regenerated.
> 
> --- libsanitizer/sanitizer_common/Makefile.am.jj	2021-11-05
> 00:43:22.647623646 +0100
> +++ libsanitizer/sanitizer_common/Makefile.am	2021-11-16 12:29:58.574930436
> +0100
> @@ -17,6 +17,7 @@ AM_CXXFLAGS += -DSANITIZER_LIBBACKTRACE
>  endif
>  AM_CCASFLAGS = $(EXTRA_ASFLAGS)
>  ACLOCAL_AMFLAGS = -I m4
> +sanitizer_platform_limits_freebsd.lo: AM_CXXFLAGS += -DUSE_SYSTEM_MD5
>  
>  noinst_LTLIBRARIES = libsanitizer_common.la
>  
> --- libsanitizer/sanitizer_common/Makefile.in.jj	2021-11-05
> 00:43:22.647623646 +0100
> +++ libsanitizer/sanitizer_common/Makefile.in	2021-11-16 12:30:58.611088913
> +0100
> @@ -796,6 +796,7 @@ uninstall-am:
>  
>  .PRECIOUS: Makefile
>  
> +sanitizer_platform_limits_freebsd.lo: AM_CXXFLAGS += -DUSE_SYSTEM_MD5
>  
>  # Tell versions [3.59,3.63) of GNU make to not export all variables.
>  # Otherwise a system limit (for SysV at least) may be exceeded.
> 
> and avoid the need of a local patches for this - the Makefiles are owned by
> gcc, not imported from compiler-rt, and we require GNU make for building gcc
> AFAIK.

Jakub. can you also fix the PR100017 today?
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100017

Just add -nostdinc++ in the configure and configure.ac based on yujie yang's
patch?

It has been reported for 7 months for such a simple bug.