commit 92936be47461b99d624b6a90a745f6cdc60d3e51
Author: Jonathan Wakely <jwakely@redhat.com>
Date:   Fri Oct 1 15:55:57 2021

    libstdc++: Restore printing of assertion messages [PR102100]
    
    My changes for PR 101429 broke the _-replacement_assert function,
    because we now always just abort without printing anything. That's
    because I added checks for _GLIBCXX_HOSTED and _GLIBCXX_VERBOSE, but the
    checks are done before those get defined.
    
    This adds a new macro which is set
    by the sed command in include/Makefile, once the HOSTED and VERBOSE
    macros have been set by the configure script.
    
    libstdc++-v3/ChangeLog:
    
            PR libstdc++/102100
            * include/Makefile.am (c++config.h): Define
            _GLIBCXX_VERBOSE_ASSERT based on configure output.
            * include/Makefile.in: Regenerate.
            * include/bits/c++config: Fix condition for verbose assertions.

diff --git a/libstdc++-v3/include/Makefile.am b/libstdc++-v3/include/Makefile.am
index 15c0ad8dd03..5a5b5fd1d1b 100644
--- a/libstdc++-v3/include/Makefile.am
+++ b/libstdc++-v3/include/Makefile.am
@@ -1315,6 +1315,12 @@ ${host_builddir}/c++config.h: ${CONFIG_HEADER} \
 	grep "^[	 ]*#[	 ]*define[	 ][	 ]*_GLIBCXX_LONG_DOUBLE_ALT128_COMPAT[	 ][	 ]*1[	 ]*$$" \
 	${CONFIG_HEADER} > /dev/null 2>&1 \
 	&& ldbl_alt128_compat='s,^#undef _GLIBCXX_LONG_DOUBLE_ALT128_COMPAT$$,#define _GLIBCXX_LONG_DOUBLE_ALT128_COMPAT 1,' ;\
+	verbose_assert='s,g,g,' ; \
+	grep "^[	 ]*#[	 ]*define[	 ][	 ]*_GLIBCXX_HOSTED[	 ][	 ]*1[	 ]*$$" \
+	${CONFIG_HEADER} > /dev/null 2>&1 \
+	&& grep "^[	 ]*#[	 ]*define[	 ][	 ]*_GLIBCXX_VERBOSE[	 ][	 ]*1[	 ]*$$" \
+	${CONFIG_HEADER} > /dev/null 2>&1 \
+	&& verbose_assert='s,^#undef _GLIBCXX_VERBOSE_ASSERT$$,#define _GLIBCXX_VERBOSE_ASSERT 1,' ;\
 	sed -e "s,define __GLIBCXX__,define __GLIBCXX__ $$date," \
 	-e "s,define _GLIBCXX_RELEASE,define _GLIBCXX_RELEASE $$release," \
 	-e "s,define _GLIBCXX_INLINE_VERSION, define _GLIBCXX_INLINE_VERSION $$ns_version," \
@@ -1326,6 +1332,7 @@ ${host_builddir}/c++config.h: ${CONFIG_HEADER} \
 	-e "s,define _GLIBCXX_USE_FLOAT128,$$float128," \
 	-e "$$ldbl_compat" \
 	-e "$$ldbl_alt128_compat" \
+	-e "$$verbose_assert" \
 	    < ${glibcxx_srcdir}/include/bits/c++config > $@ ;\
 	sed -e 's/HAVE_/_GLIBCXX_HAVE_/g' \
 	    -e 's/PACKAGE/_GLIBCXX_PACKAGE/g' \
diff --git a/libstdc++-v3/include/bits/c++config b/libstdc++-v3/include/bits/c++config
index 32b8957f814..69343a25533 100644
--- a/libstdc++-v3/include/bits/c++config
+++ b/libstdc++-v3/include/bits/c++config
@@ -506,11 +506,12 @@ namespace std
 # define __glibcxx_constexpr_assert(unevaluated)
 #endif
 
+#undef _GLIBCXX_VERBOSE_ASSERT
 
 // Assert.
 #if defined(_GLIBCXX_ASSERTIONS) \
   || defined(_GLIBCXX_PARALLEL) || defined(_GLIBCXX_PARALLEL_ASSERTIONS)
-# if _GLIBCXX_HOSTED && _GLIBCXX_VERBOSE
+# ifdef _GLIBCXX_VERBOSE_ASSERT
 namespace std
 {
   // Avoid the use of assert, because we're trying to keep the <cassert>
@@ -533,7 +534,7 @@ namespace std
     std::__replacement_assert(__FILE__, __LINE__, __PRETTY_FUNCTION__, \
 			      #_Condition);			       \
   }
-# else // ! VERBOSE
+# else // ! VERBOSE_ASSERT
 # define __glibcxx_assert_impl(_Condition)		\
   if (__builtin_expect(!bool(_Condition), false))	\
   {							\