AC_C_CONST was marked as an obsolescent macro back in autoconf 2.60. We also
use C++ here.

gcc/ChangeLog:
        PR bootstrap/112422

        * config.h.in: Regenerate.
        * configure: Regenerate.
        * configure.ac: Drop AC_C_CONST.
---
 gcc/config.in    |  6 ------
 gcc/configure    | 46 ++--------------------------------------------
 gcc/configure.ac |  1 -
 3 files changed, 2 insertions(+), 51 deletions(-)

diff --git a/gcc/config.in b/gcc/config.in
index 8ab07d1ef2bd..d84f59931da4 100644
--- a/gcc/config.in
+++ b/gcc/config.in
@@ -2745,12 +2745,6 @@
 #endif
 
 
-/* Define to `__inline__' or `__inline' if that's what the C compiler
-   calls it, or to nothing if 'inline' is not supported under any name.  */
-#ifndef __cplusplus
-#undef inline
-#endif
-
 /* Define to the type of a signed integer type of width exactly 16 bits if
    such a type exists and the standard includes do not define it. */
 #ifndef USED_FOR_TARGET
diff --git a/gcc/configure b/gcc/configure
index f509609de673..c68d0865fb65 100755
--- a/gcc/configure
+++ b/gcc/configure
@@ -6195,48 +6195,6 @@ ac_compile='$CXX -c $CXXFLAGS $CPPFLAGS conftest.$ac_ext 
>&5'
 ac_link='$CXX -o conftest$ac_exeext $CXXFLAGS $CPPFLAGS $LDFLAGS 
conftest.$ac_ext $LIBS >&5'
 ac_compiler_gnu=$ac_cv_cxx_compiler_gnu
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for inline" >&5
-$as_echo_n "checking for inline... " >&6; }
-if ${ac_cv_c_inline+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
-  ac_cv_c_inline=no
-for ac_kw in inline __inline__ __inline; do
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-#ifndef __cplusplus
-typedef int foo_t;
-static $ac_kw foo_t static_foo () {return 0; }
-$ac_kw foo_t foo () {return 0; }
-#endif
-
-_ACEOF
-if ac_fn_cxx_try_compile "$LINENO"; then :
-  ac_cv_c_inline=$ac_kw
-fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-  test "$ac_cv_c_inline" != no && break
-done
-
-fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_c_inline" >&5
-$as_echo "$ac_cv_c_inline" >&6; }
-
-case $ac_cv_c_inline in
-  inline | yes) ;;
-  *)
-    case $ac_cv_c_inline in
-      no) ac_val=;;
-      *) ac_val=$ac_cv_c_inline;;
-    esac
-    cat >>confdefs.h <<_ACEOF
-#ifndef __cplusplus
-#define inline $ac_val
-#endif
-_ACEOF
-    ;;
-esac
-
 
 # Check whether --enable-largefile was given.
 if test "${enable_largefile+set}" = set; then :
@@ -21872,7 +21830,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 21875 "configure"
+#line 21833 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -21978,7 +21936,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 21981 "configure"
+#line 21939 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
diff --git a/gcc/configure.ac b/gcc/configure.ac
index 14fe4c095bde..37f04e1a5076 100644
--- a/gcc/configure.ac
+++ b/gcc/configure.ac
@@ -500,7 +500,6 @@ AC_SUBST(PICFLAG_FOR_TARGET)
 AC_USE_SYSTEM_EXTENSIONS
 
 AC_PROG_CPP
-AC_C_INLINE
 
 AC_SYS_LARGEFILE
 AC_CHECK_SIZEOF(ino_t)
-- 
2.56.0

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