https://gcc.gnu.org/g:44ec0091c2e08ad7225854a4784dc8fa44975885

commit r17-5039-g44ec0091c2e08ad7225854a4784dc8fa44975885
Author: Sam James <[email protected]>
Date:   Tue Jun 9 23:52:27 2026 +0100

    libitm: drop unused header checks
    
    malloc.h, semaphore.h, sys/time.h are unused. unistd.h is used but
    without checking the guard, so drop the check.
    
    libitm/ChangeLog:
            PR bootstrap/112422
    
            * config.h.in: Regenerate.
            * configure: Regenerate.
            * configure.ac: Don't search for malloc.h, semaphore.h, sys/time.h,
            or unistd.h.
            (AC_HEADER_TIME): Delete.

Diff:
---
 libitm/config.h.in  |  12 ----
 libitm/configure    | 156 ++--------------------------------------------------
 libitm/configure.ac |   4 +-
 3 files changed, 5 insertions(+), 167 deletions(-)

diff --git a/libitm/config.h.in b/libitm/config.h.in
index 26972c7e43e5..8f84097d7322 100644
--- a/libitm/config.h.in
+++ b/libitm/config.h.in
@@ -45,9 +45,6 @@
 /* Define to 1 if you have the <inttypes.h> header file. */
 #undef HAVE_INTTYPES_H
 
-/* Define to 1 if you have the <malloc.h> header file. */
-#undef HAVE_MALLOC_H
-
 /* Define to 1 if you have the `memalign' function. */
 #undef HAVE_MEMALIGN
 
@@ -66,9 +63,6 @@
 /* Define to 1 if you have the `posix_memalign' function. */
 #undef HAVE_POSIX_MEMALIGN
 
-/* Define to 1 if you have the <semaphore.h> header file. */
-#undef HAVE_SEMAPHORE_H
-
 /* Define to 1 if you have the <stdint.h> header file. */
 #undef HAVE_STDINT_H
 
@@ -93,9 +87,6 @@
 /* Define to 1 if you have the <sys/stat.h> header file. */
 #undef HAVE_SYS_STAT_H
 
-/* Define to 1 if you have the <sys/time.h> header file. */
-#undef HAVE_SYS_TIME_H
-
 /* Define to 1 if you have the <sys/types.h> header file. */
 #undef HAVE_SYS_TYPES_H
 
@@ -157,9 +148,6 @@
 /* Define if you can safely include both <string.h> and <strings.h>. */
 #undef STRING_WITH_STRINGS
 
-/* Define to 1 if you can safely include both <sys/time.h> and <time.h>. */
-#undef TIME_WITH_SYS_TIME
-
 /* Version number of package */
 #undef VERSION
 
diff --git a/libitm/configure b/libitm/configure
index 95f1d7410b9c..f6df36a3823f 100755
--- a/libitm/configure
+++ b/libitm/configure
@@ -15985,153 +15985,6 @@ libtool_VERSION=1:0:0
 
 
 # Check header files.
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for ANSI C header files" >&5
-$as_echo_n "checking for ANSI C header files... " >&6; }
-if ${ac_cv_header_stdc+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-#include <stdlib.h>
-#include <stdarg.h>
-#include <string.h>
-#include <float.h>
-
-int
-main ()
-{
-
-  ;
-  return 0;
-}
-_ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
-  ac_cv_header_stdc=yes
-else
-  ac_cv_header_stdc=no
-fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-
-if test $ac_cv_header_stdc = yes; then
-  # SunOS 4.x string.h does not declare mem*, contrary to ANSI.
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-#include <string.h>
-
-_ACEOF
-if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
-  $EGREP "memchr" >/dev/null 2>&1; then :
-
-else
-  ac_cv_header_stdc=no
-fi
-rm -f conftest*
-
-fi
-
-if test $ac_cv_header_stdc = yes; then
-  # ISC 2.0.2 stdlib.h does not declare free, contrary to ANSI.
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-#include <stdlib.h>
-
-_ACEOF
-if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
-  $EGREP "free" >/dev/null 2>&1; then :
-
-else
-  ac_cv_header_stdc=no
-fi
-rm -f conftest*
-
-fi
-
-if test $ac_cv_header_stdc = yes; then
-  # /bin/cc in Irix-4.0.5 gets non-ANSI ctype macros unless using -ansi.
-  if test "$cross_compiling" = yes; then :
-  :
-else
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-#include <ctype.h>
-#include <stdlib.h>
-#if ((' ' & 0x0FF) == 0x020)
-# define ISLOWER(c) ('a' <= (c) && (c) <= 'z')
-# define TOUPPER(c) (ISLOWER(c) ? 'A' + ((c) - 'a') : (c))
-#else
-# define ISLOWER(c) \
-                  (('a' <= (c) && (c) <= 'i') \
-                    || ('j' <= (c) && (c) <= 'r') \
-                    || ('s' <= (c) && (c) <= 'z'))
-# define TOUPPER(c) (ISLOWER(c) ? ((c) | 0x40) : (c))
-#endif
-
-#define XOR(e, f) (((e) && !(f)) || (!(e) && (f)))
-int
-main ()
-{
-  int i;
-  for (i = 0; i < 256; i++)
-    if (XOR (islower (i), ISLOWER (i))
-       || toupper (i) != TOUPPER (i))
-      return 2;
-  return 0;
-}
-_ACEOF
-if ac_fn_c_try_run "$LINENO"; then :
-
-else
-  ac_cv_header_stdc=no
-fi
-rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
-  conftest.$ac_objext conftest.beam conftest.$ac_ext
-fi
-
-fi
-fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_header_stdc" >&5
-$as_echo "$ac_cv_header_stdc" >&6; }
-if test $ac_cv_header_stdc = yes; then
-
-$as_echo "#define STDC_HEADERS 1" >>confdefs.h
-
-fi
-
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether time.h and 
sys/time.h may both be included" >&5
-$as_echo_n "checking whether time.h and sys/time.h may both be included... " 
>&6; }
-if ${ac_cv_header_time+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-#include <sys/types.h>
-#include <sys/time.h>
-#include <time.h>
-
-int
-main ()
-{
-if ((struct tm *) 0)
-return 0;
-  ;
-  return 0;
-}
-_ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
-  ac_cv_header_time=yes
-else
-  ac_cv_header_time=no
-fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_header_time" >&5
-$as_echo "$ac_cv_header_time" >&6; }
-if test $ac_cv_header_time = yes; then
-
-$as_echo "#define TIME_WITH_SYS_TIME 1" >>confdefs.h
-
-fi
-
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether string.h and 
strings.h may both be included" >&5
 $as_echo_n "checking whether string.h and strings.h may both be included... " 
>&6; }
 if ${gcc_cv_header_string+:} false; then :
@@ -16164,13 +16017,12 @@ $as_echo "#define STRING_WITH_STRINGS 1" >>confdefs.h
 
 fi
 
-for ac_header in unistd.h semaphore.h sys/time.h sys/auxv.h malloc.h
+for ac_header in sys/auxv.h
 do :
-  as_ac_Header=`$as_echo "ac_cv_header_$ac_header" | $as_tr_sh`
-ac_fn_c_check_header_mongrel "$LINENO" "$ac_header" "$as_ac_Header" 
"$ac_includes_default"
-if eval test \"x\$"$as_ac_Header"\" = x"yes"; then :
+  ac_fn_c_check_header_mongrel "$LINENO" "sys/auxv.h" 
"ac_cv_header_sys_auxv_h" "$ac_includes_default"
+if test "x$ac_cv_header_sys_auxv_h" = xyes; then :
   cat >>confdefs.h <<_ACEOF
-#define `$as_echo "HAVE_$ac_header" | $as_tr_cpp` 1
+#define HAVE_SYS_AUXV_H 1
 _ACEOF
 
 fi
diff --git a/libitm/configure.ac b/libitm/configure.ac
index 7bc5ba204f97..a9fe2d5df7e4 100644
--- a/libitm/configure.ac
+++ b/libitm/configure.ac
@@ -165,10 +165,8 @@ libtool_VERSION=1:0:0
 AC_SUBST(libtool_VERSION)
 
 # Check header files.
-AC_HEADER_STDC
-AC_HEADER_TIME
 ACX_HEADER_STRING
-AC_CHECK_HEADERS(unistd.h semaphore.h sys/time.h sys/auxv.h malloc.h)
+AC_CHECK_HEADERS(sys/auxv.h)
 
 GCC_HEADER_STDINT(gstdint.h)

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