* configure, config.h.in: Rebuild.

	* configure.ac: Use GLIBCXX_CHECK_SDT_H.  Don't check for
	sys/sdt.h.
	* acinclude.m4 (GLIBCXX_CHECK_SDT_H): New defun.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@197649 138bc75d-0d04-0410-961f-82ee72b054a4

5 files changed, 99 insertions, 7 deletions

diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index a8eade95573..3ccf5f442df 100644
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,3 +1,10 @@
+2013-04-09  Tom Tromey  <tromey@redhat.com>
+
+	* configure, config.h.in: Rebuild.
+	* configure.ac: Use GLIBCXX_CHECK_SDT_H.  Don't check for
+	sys/sdt.h.
+	* acinclude.m4 (GLIBCXX_CHECK_SDT_H): New defun.
+
 2013-04-09  Uros Bizjak  <ubizjak@gmail.com>
 
 	* config/abi/post/alpha-linux-gnu/baseline_symbols.txt: Update.
diff --git a/libstdc++-v3/acinclude.m4 b/libstdc++-v3/acinclude.m4
index 4d06b207af1..619fff02bf7 100644
--- a/libstdc++-v3/acinclude.m4
+++ b/libstdc++-v3/acinclude.m4
@@ -3660,6 +3660,36 @@ AC_DEFUN([GLIBCXX_ENABLE_WERROR], [
 ])
 
 
+dnl
+dnl Check to see if sys/sdt.h exists and that it is suitable for use.
+dnl Some versions of sdt.h were not compatible with C++11.
+dnl
+AC_DEFUN([GLIBCXX_CHECK_SDT_H], [
+  AC_MSG_RESULT([for suitable sys/sdt.h])
+  # Note that this test has to be run with the C language.
+  # Otherwise, sdt.h will try to include some headers from
+  # libstdc++ itself.
+  AC_LANG_SAVE
+  AC_LANG_C
+  AC_CACHE_VAL(glibcxx_cv_sys_sdt_h, [
+    # Because we have to run the test in C, we use grep rather
+    # than the compiler to check for the bug.  The bug is that
+    # were strings without trailing whitespace, causing g++
+    # to look for operator"".  The pattern searches for the fixed
+    # output.
+    AC_EGREP_CPP([ \",\" ], [
+      #include <sys/sdt.h>
+      int f() { STAP_PROBE(hi, bob); }
+    ], [glibcxx_cv_sys_sdt_h=yes], [glibcxx_cv_sys_sdt_h=no])
+  ])
+  AC_LANG_RESTORE
+  if test $glibcxx_cv_sys_sdt_h = yes; then
+    AC_DEFINE(HAVE_SYS_SDT_H, 1,
+              [Define to 1 if you have a suitable <sys/sdt.h> header file])
+  fi
+  AC_MSG_RESULT($glibcxx_cv_sys_sdt_h)
+])
+
 # Macros from the top-level gcc directory.
 m4_include([../config/gc++filt.m4])
 m4_include([../config/tls.m4])
diff --git a/libstdc++-v3/config.h.in b/libstdc++-v3/config.h.in
index 9937a1ed155..90d0479347e 100644
--- a/libstdc++-v3/config.h.in
+++ b/libstdc++-v3/config.h.in
@@ -400,7 +400,7 @@
 /* Define to 1 if you have the <sys/resource.h> header file. */
 #undef HAVE_SYS_RESOURCE_H
 
-/* Define to 1 if you have the <sys/sdt.h> header file. */
+/* Define to 1 if you have a suitable <sys/sdt.h> header file */
 #undef HAVE_SYS_SDT_H
 
 /* Define to 1 if you have the <sys/sem.h> header file. */
diff --git a/libstdc++-v3/configure b/libstdc++-v3/configure
index 17b6a266c73..44374746c2b 100755
--- a/libstdc++-v3/configure
+++ b/libstdc++-v3/configure
@@ -3530,11 +3530,11 @@ MAKEINFO=${MAKEINFO-"${am_missing_run}makeinfo"}
 
 # We need awk for the "check" target.  The system "awk" is bad on
 # some platforms.
-# Always define AMTAR for backward compatibility.  Yes, it's still used
-# in the wild :-(  We should find a proper way to deprecate it ...
-AMTAR='$${TAR-tar}'
+# Always define AMTAR for backward compatibility.
 
-am__tar='$${TAR-tar} chof - "$$tardir"' am__untar='$${TAR-tar} xf -'
+AMTAR=${AMTAR-"${am_missing_run}tar"}
+
+am__tar='${AMTAR} chof - "$$tardir"'; am__untar='${AMTAR} xf -'
 
 
 
@@ -20413,11 +20413,65 @@ ac_compiler_gnu=$ac_cv_c_compiler_gnu
 
 
 
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: for suitable sys/sdt.h" >&5
+$as_echo "for suitable sys/sdt.h" >&6; }
+  # Note that this test has to be run with the C language.
+  # Otherwise, sdt.h will try to include some headers from
+  # libstdc++ itself.
+
+  ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+
+  if test "${glibcxx_cv_sys_sdt_h+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+
+    # Because we have to run the test in C, we use grep rather
+    # than the compiler to check for the bug.  The bug is that
+    # were strings without trailing whitespace, causing g++
+    # to look for operator"".  The pattern searches for the fixed
+    # output.
+    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+      #include <sys/sdt.h>
+      int f() { STAP_PROBE(hi, bob); }
+
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  $EGREP " \",\" " >/dev/null 2>&1; then :
+  glibcxx_cv_sys_sdt_h=yes
+else
+  glibcxx_cv_sys_sdt_h=no
+fi
+rm -f conftest*
+
+
+fi
+
+  ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+
+  if test $glibcxx_cv_sys_sdt_h = yes; then
+
+$as_echo "#define HAVE_SYS_SDT_H 1" >>confdefs.h
+
+  fi
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $glibcxx_cv_sys_sdt_h" >&5
+$as_echo "$glibcxx_cv_sys_sdt_h" >&6; }
+
+
 # Check for available headers.
 for ac_header in endian.h execinfo.h float.h fp.h ieeefp.h inttypes.h \
 locale.h machine/endian.h machine/param.h nan.h stdint.h stdlib.h string.h \
 strings.h sys/ipc.h sys/isa_defs.h sys/machine.h sys/param.h \
-sys/resource.h sys/sdt.h sys/sem.h sys/stat.h sys/time.h sys/types.h unistd.h \
+sys/resource.h sys/sem.h sys/stat.h sys/time.h sys/types.h unistd.h \
 wchar.h wctype.h
 do :
   as_ac_Header=`$as_echo "ac_cv_header_$ac_header" | $as_tr_sh`
diff --git a/libstdc++-v3/configure.ac b/libstdc++-v3/configure.ac
index de664064491..73d430ac105 100644
--- a/libstdc++-v3/configure.ac
+++ b/libstdc++-v3/configure.ac
@@ -211,12 +211,13 @@ GLIBCXX_CHECK_SC_NPROCESSORS_ONLN
 GLIBCXX_CHECK_SC_NPROC_ONLN
 GLIBCXX_CHECK_PTHREADS_NUM_PROCESSORS_NP
 GLIBCXX_CHECK_SYSCTL_HW_NCPU
+GLIBCXX_CHECK_SDT_H
 
 # Check for available headers.
 AC_CHECK_HEADERS([endian.h execinfo.h float.h fp.h ieeefp.h inttypes.h \
 locale.h machine/endian.h machine/param.h nan.h stdint.h stdlib.h string.h \
 strings.h sys/ipc.h sys/isa_defs.h sys/machine.h sys/param.h \
-sys/resource.h sys/sdt.h sys/sem.h sys/stat.h sys/time.h sys/types.h unistd.h \
+sys/resource.h sys/sem.h sys/stat.h sys/time.h sys/types.h unistd.h \
 wchar.h wctype.h])
 
 # Only do link tests if native. Else, hardcode.