revert: no-executables.m4 (GCC_TRY_COMPILE_OR_LINK): New function.

config/
	Revert:
	2007-10-02  Richard Sandiford  <richard@codesourcery.com>
	* no-executables.m4 (GCC_TRY_COMPILE_OR_LINK): New function.

libstdc++/
	Revert:
	2007-10-02  Richard Sandiford  <richard@codesourcery.com>
	* acinclude.m4 (GLIBCXX_ENABLE_C99): Temporarily add
	-fno-exceptions to CXXFLAGS.  Use GCC_TRY_COMPILE_OR_LINK.
	Make the tests assign results to volatile variables.
	* configure: Regenerate.

From-SVN: r128972

3 files changed, 160 insertions, 495 deletions

diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index a87645a..8350df8 100644
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,3 +1,12 @@
+2007-10-03  Kazu Hirata  <kazu@codesourcery.com>
+
+	Revert:
+	2007-10-02  Richard Sandiford  <richard@codesourcery.com>
+	* acinclude.m4 (GLIBCXX_ENABLE_C99): Temporarily add
+	-fno-exceptions to CXXFLAGS.  Use GCC_TRY_COMPILE_OR_LINK.
+	Make the tests assign results to volatile variables.
+	* configure: Regenerate.
+
 2007-10-02  Richard Sandiford  <richard@codesourcery.com>
 
 	* acinclude.m4 (GLIBCXX_ENABLE_C99): Temporarily add
diff --git a/libstdc++-v3/acinclude.m4 b/libstdc++-v3/acinclude.m4
index b0263ab..c26225e 100644
--- a/libstdc++-v3/acinclude.m4
+++ b/libstdc++-v3/acinclude.m4
@@ -763,32 +763,24 @@ AC_DEFUN([GLIBCXX_ENABLE_C99], [
   AC_LANG_SAVE
   AC_LANG_CPLUSPLUS
 
-  # Use -fno-exceptions so that the C driver can link these tests without
-  # hitting undefined references to personality routines.
-  ac_save_CXXFLAGS="$CXXFLAGS"
-  CXXFLAGS="$CXXFLAGS -fno-exceptions"
-
   # Check for the existence of <math.h> functions used if C99 is enabled.
   AC_MSG_CHECKING([for ISO C99 support in <math.h>])
   AC_CACHE_VAL(ac_c99_math, [
-  GCC_TRY_COMPILE_OR_LINK(
-     [#include <math.h>
-      volatile double d1, d2;
-      volatile int i;],
-     [i = fpclassify(d1);
-      i = isfinite(d1);
-      i = isinf(d1);
-      i = isnan(d1);
-      i = isnormal(d1);
-      i = signbit(d1);
-      i = isgreater(d1, d2);
-      i = isgreaterequal(d1, d2);
-      i = isless(d1, d2);
-      i = islessequal(d1, d2);
-      i = islessgreater(d1, d2);
-      i = islessgreater(d1, d2);
-      i = isunordered(d1, d2);
-     ],[ac_c99_math=yes], [ac_c99_math=no])
+  AC_TRY_COMPILE([#include <math.h>],
+	         [fpclassify(0.0);
+	          isfinite(0.0); 
+		  isinf(0.0);
+	          isnan(0.0);
+		  isnormal(0.0);
+	  	  signbit(0.0);
+	 	  isgreater(0.0,0.0);
+		  isgreaterequal(0.0,0.0);
+		  isless(0.0,0.0);
+		  islessequal(0.0,0.0);
+		  islessgreater(0.0,0.0);
+		  islessgreater(0.0,0.0);
+		  isunordered(0.0,0.0);
+		 ],[ac_c99_math=yes], [ac_c99_math=no])
   ])
   AC_MSG_RESULT($ac_c99_math)
   if test x"$ac_c99_math" = x"yes"; then
@@ -806,54 +798,47 @@ AC_DEFUN([GLIBCXX_ENABLE_C99], [
   ac_c99_complex=no;
   if test x"$ac_has_complex_h" = x"yes"; then
     AC_MSG_CHECKING([for ISO C99 support in <complex.h>])
-    GCC_TRY_COMPILE_OR_LINK(
-       [#include <complex.h>
-	typedef __complex__ float float_type;
-	typedef __complex__ double double_type;
-	typedef __complex__ long double ld_type;
-	volatile float_type tmpf;
-	volatile double_type tmpd;
-	volatile ld_type tmpld;
-	volatile float f;
-	volatile double d;
-	volatile long double ld;],
-       [f = cabsf(tmpf);
-	f = cargf(tmpf);
-	tmpf = ccosf(tmpf);
-	tmpf = ccoshf(tmpf);
-	tmpf = cexpf(tmpf);
-	tmpf = clogf(tmpf);
-	tmpf = csinf(tmpf);
-	tmpf = csinhf(tmpf);
-	tmpf = csqrtf(tmpf);
-	tmpf = ctanf(tmpf);
-	tmpf = ctanhf(tmpf);
-	tmpf = cpowf(tmpf, tmpf);
-	d = cabs(tmpd);
-	d = carg(tmpd);
-	tmpd = ccos(tmpd);
-	tmpd = ccosh(tmpd);
-	tmpd = cexp(tmpd);
-	tmpd = clog(tmpd);
-	tmpd = csin(tmpd);
-	tmpd = csinh(tmpd);
-	tmpd = csqrt(tmpd);
-	tmpd = ctan(tmpd);
-	tmpd = ctanh(tmpd);
-	tmpd = cpow(tmpd, tmpd);
-	ld = cabsl(tmpld);
-	ld = cargl(tmpld);
-	tmpld = ccosl(tmpld);
-	tmpld = ccoshl(tmpld);
-	tmpld = cexpl(tmpld);
-	tmpld = clogl(tmpld);
-	tmpld = csinl(tmpld);
-	tmpld = csinhl(tmpld);
-	tmpld = csqrtl(tmpld);
-	tmpld = ctanl(tmpld);
-	tmpld = ctanhl(tmpld);
-	tmpld = cpowl(tmpld, tmpld);
-       ],[ac_c99_complex=yes], [ac_c99_complex=no])
+    AC_TRY_COMPILE([#include <complex.h>],
+	           [typedef __complex__ float float_type; float_type tmpf;
+	            cabsf(tmpf);
+		    cargf(tmpf);
+		    ccosf(tmpf);
+  		    ccoshf(tmpf);
+		    cexpf(tmpf);
+	            clogf(tmpf);
+		    csinf(tmpf);
+		    csinhf(tmpf);
+		    csqrtf(tmpf);
+		    ctanf(tmpf);
+		    ctanhf(tmpf);
+		    cpowf(tmpf, tmpf);
+		    typedef __complex__ double double_type; double_type tmpd;
+	            cabs(tmpd);
+		    carg(tmpd);
+		    ccos(tmpd);
+  		    ccosh(tmpd);
+		    cexp(tmpd);
+	            clog(tmpd);
+		    csin(tmpd);
+		    csinh(tmpd);
+		    csqrt(tmpd);
+		    ctan(tmpd);
+		    ctanh(tmpd);
+		    cpow(tmpd, tmpd);
+		    typedef __complex__ long double ld_type; ld_type tmpld;
+	            cabsl(tmpld);
+		    cargl(tmpld);
+		    ccosl(tmpld);
+  		    ccoshl(tmpld);
+		    cexpl(tmpld);
+	            clogl(tmpld);
+		    csinl(tmpld);
+		    csinhl(tmpld);
+		    csqrtl(tmpld);
+		    ctanl(tmpld);
+		    ctanhl(tmpld);
+		    cpowl(tmpld, tmpld);
+		   ],[ac_c99_complex=yes], [ac_c99_complex=no])
   fi
   AC_MSG_RESULT($ac_c99_complex)
   if test x"$ac_c99_complex" = x"yes"; then
@@ -866,43 +851,35 @@ AC_DEFUN([GLIBCXX_ENABLE_C99], [
   # Check for the existence in <stdio.h> of vscanf, et. al.
   AC_MSG_CHECKING([for ISO C99 support in <stdio.h>])
   AC_CACHE_VAL(ac_c99_stdio, [
-  GCC_TRY_COMPILE_OR_LINK(
-     [#include <stdio.h>
-      #include <stdarg.h>
-      void foo(char* fmt, ...)
-      {
-	va_list args; va_start(args, fmt);
-	vfscanf(stderr, "%i", args); 
-	vscanf("%i", args);
-	vsnprintf(fmt, 0, "%i", args);
-	vsscanf(fmt, "%i", args);
-      }],
-     [snprintf("12", 0, "%i");],
-     [ac_c99_stdio=yes], [ac_c99_stdio=no])
+  AC_TRY_COMPILE([#include <stdio.h>
+		  #include <stdarg.h>
+                  void foo(char* fmt, ...)
+                  {
+	            va_list args; va_start(args, fmt);
+                    vfscanf(stderr, "%i", args); 
+		    vscanf("%i", args);
+                    vsnprintf(fmt, 0, "%i", args);
+                    vsscanf(fmt, "%i", args);
+		  }],
+                 [snprintf("12", 0, "%i");],
+		 [ac_c99_stdio=yes], [ac_c99_stdio=no])
   ])
   AC_MSG_RESULT($ac_c99_stdio)
 
   # Check for the existence in <stdlib.h> of lldiv_t, et. al.
   AC_MSG_CHECKING([for ISO C99 support in <stdlib.h>])
   AC_CACHE_VAL(ac_c99_stdlib, [
-  GCC_TRY_COMPILE_OR_LINK(
-     [#include <stdlib.h>
-      volatile float f;
-      volatile long double ld;
-      volatile unsigned long long ll;
-      lldiv_t mydivt;],
-     [char* tmp;
-      f = strtof("gnu", &tmp);
-      ld = strtold("gnu", &tmp);
-      ll = strtoll("gnu", &tmp, 10);
-      ll = strtoull("gnu", &tmp, 10);
-      ll = llabs(10);
-      mydivt = lldiv(10,1);
-      ll = mydivt.quot;
-      ll = mydivt.rem;
-      ll = atoll("10");
-      _Exit(0);
-      ],[ac_c99_stdlib=yes], [ac_c99_stdlib=no])
+  AC_TRY_COMPILE([#include <stdlib.h>],
+                 [char* tmp;
+	    	  strtof("gnu", &tmp);
+		  strtold("gnu", &tmp);
+	          strtoll("gnu", &tmp, 10);
+	          strtoull("gnu", &tmp, 10);
+	          llabs(10);
+		  lldiv(10,1);
+		  atoll("10");
+		  _Exit(0);
+		  lldiv_t mydivt;],[ac_c99_stdlib=yes], [ac_c99_stdlib=no])
   ])
   AC_MSG_RESULT($ac_c99_stdlib)
 
@@ -963,7 +940,6 @@ AC_DEFUN([GLIBCXX_ENABLE_C99], [
     <complex.h>, <stdio.h>, and <stdlib.h> can be used or exposed.])
   fi
 
-  CXXFLAGS="$ac_save_CXXFLAGS"
   AC_LANG_RESTORE
   fi	
 
diff --git a/libstdc++-v3/configure b/libstdc++-v3/configure
index 772e6de..e42e1bb 100755
--- a/libstdc++-v3/configure
+++ b/libstdc++-v3/configure
@@ -15436,11 +15436,6 @@ ac_link='$CXX -o conftest$ac_exeext $CXXFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ex
 ac_compiler_gnu=$ac_cv_cxx_compiler_gnu
 
 
-  # Use -fno-exceptions so that the C driver can link these tests without
-  # hitting undefined references to personality routines.
-  ac_save_CXXFLAGS="$CXXFLAGS"
-  CXXFLAGS="$CXXFLAGS -fno-exceptions"
-
   # Check for the existence of <math.h> functions used if C99 is enabled.
   echo "$as_me:$LINENO: checking for ISO C99 support in <math.h>" >&5
 echo $ECHO_N "checking for ISO C99 support in <math.h>... $ECHO_C" >&6
@@ -15448,7 +15443,6 @@ echo $ECHO_N "checking for ISO C99 support in <math.h>... $ECHO_C" >&6
   echo $ECHO_N "(cached) $ECHO_C" >&6
 else
 
-  if test x$gcc_no_link = xyes; then
   cat >conftest.$ac_ext <<_ACEOF
 /* confdefs.h.  */
 _ACEOF
@@ -15456,24 +15450,22 @@ cat confdefs.h >>conftest.$ac_ext
 cat >>conftest.$ac_ext <<_ACEOF
 /* end confdefs.h.  */
 #include <math.h>
-      volatile double d1, d2;
-      volatile int i;
 int
 main ()
 {
-i = fpclassify(d1);
-      i = isfinite(d1);
-      i = isinf(d1);
-      i = isnan(d1);
-      i = isnormal(d1);
-      i = signbit(d1);
-      i = isgreater(d1, d2);
-      i = isgreaterequal(d1, d2);
-      i = isless(d1, d2);
-      i = islessequal(d1, d2);
-      i = islessgreater(d1, d2);
-      i = islessgreater(d1, d2);
-      i = isunordered(d1, d2);
+fpclassify(0.0);
+	          isfinite(0.0);
+		  isinf(0.0);
+	          isnan(0.0);
+		  isnormal(0.0);
+	  	  signbit(0.0);
+	 	  isgreater(0.0,0.0);
+		  isgreaterequal(0.0,0.0);
+		  isless(0.0,0.0);
+		  islessequal(0.0,0.0);
+		  islessgreater(0.0,0.0);
+		  islessgreater(0.0,0.0);
+		  isunordered(0.0,0.0);
 
   ;
   return 0;
@@ -15509,74 +15501,6 @@ sed 's/^/| /' conftest.$ac_ext >&5
 ac_c99_math=no
 fi
 rm -f conftest.err conftest.$ac_objext conftest.$ac_ext
-else
-  if test x$gcc_no_link = xyes; then
-  { { echo "$as_me:$LINENO: error: Link tests are not allowed after GCC_NO_EXECUTABLES." >&5
-echo "$as_me: error: Link tests are not allowed after GCC_NO_EXECUTABLES." >&2;}
-   { (exit 1); exit 1; }; }
-fi
-cat >conftest.$ac_ext <<_ACEOF
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
-/* end confdefs.h.  */
-#include <math.h>
-      volatile double d1, d2;
-      volatile int i;
-int
-main ()
-{
-i = fpclassify(d1);
-      i = isfinite(d1);
-      i = isinf(d1);
-      i = isnan(d1);
-      i = isnormal(d1);
-      i = signbit(d1);
-      i = isgreater(d1, d2);
-      i = isgreaterequal(d1, d2);
-      i = isless(d1, d2);
-      i = islessequal(d1, d2);
-      i = islessgreater(d1, d2);
-      i = islessgreater(d1, d2);
-      i = isunordered(d1, d2);
-
-  ;
-  return 0;
-}
-_ACEOF
-rm -f conftest.$ac_objext conftest$ac_exeext
-if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
-  (eval $ac_link) 2>conftest.er1
-  ac_status=$?
-  grep -v '^ *+' conftest.er1 >conftest.err
-  rm -f conftest.er1
-  cat conftest.err >&5
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } &&
-	 { ac_try='test -z "$ac_cxx_werror_flag"
-			 || test ! -s conftest.err'
-  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
-  (eval $ac_try) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); }; } &&
-	 { ac_try='test -s conftest$ac_exeext'
-  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
-  (eval $ac_try) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); }; }; then
-  ac_c99_math=yes
-else
-  echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-ac_c99_math=no
-fi
-rm -f conftest.err conftest.$ac_objext \
-      conftest$ac_exeext conftest.$ac_ext
-fi
 
 fi
 
@@ -15902,62 +15826,55 @@ done
   if test x"$ac_has_complex_h" = x"yes"; then
     echo "$as_me:$LINENO: checking for ISO C99 support in <complex.h>" >&5
 echo $ECHO_N "checking for ISO C99 support in <complex.h>... $ECHO_C" >&6
-    if test x$gcc_no_link = xyes; then
-  cat >conftest.$ac_ext <<_ACEOF
+    cat >conftest.$ac_ext <<_ACEOF
 /* confdefs.h.  */
 _ACEOF
 cat confdefs.h >>conftest.$ac_ext
 cat >>conftest.$ac_ext <<_ACEOF
 /* end confdefs.h.  */
 #include <complex.h>
-	typedef __complex__ float float_type;
-	typedef __complex__ double double_type;
-	typedef __complex__ long double ld_type;
-	volatile float_type tmpf;
-	volatile double_type tmpd;
-	volatile ld_type tmpld;
-	volatile float f;
-	volatile double d;
-	volatile long double ld;
 int
 main ()
 {
-f = cabsf(tmpf);
-	f = cargf(tmpf);
-	tmpf = ccosf(tmpf);
-	tmpf = ccoshf(tmpf);
-	tmpf = cexpf(tmpf);
-	tmpf = clogf(tmpf);
-	tmpf = csinf(tmpf);
-	tmpf = csinhf(tmpf);
-	tmpf = csqrtf(tmpf);
-	tmpf = ctanf(tmpf);
-	tmpf = ctanhf(tmpf);
-	tmpf = cpowf(tmpf, tmpf);
-	d = cabs(tmpd);
-	d = carg(tmpd);
-	tmpd = ccos(tmpd);
-	tmpd = ccosh(tmpd);
-	tmpd = cexp(tmpd);
-	tmpd = clog(tmpd);
-	tmpd = csin(tmpd);
-	tmpd = csinh(tmpd);
-	tmpd = csqrt(tmpd);
-	tmpd = ctan(tmpd);
-	tmpd = ctanh(tmpd);
-	tmpd = cpow(tmpd, tmpd);
-	ld = cabsl(tmpld);
-	ld = cargl(tmpld);
-	tmpld = ccosl(tmpld);
-	tmpld = ccoshl(tmpld);
-	tmpld = cexpl(tmpld);
-	tmpld = clogl(tmpld);
-	tmpld = csinl(tmpld);
-	tmpld = csinhl(tmpld);
-	tmpld = csqrtl(tmpld);
-	tmpld = ctanl(tmpld);
-	tmpld = ctanhl(tmpld);
-	tmpld = cpowl(tmpld, tmpld);
+typedef __complex__ float float_type; float_type tmpf;
+	            cabsf(tmpf);
+		    cargf(tmpf);
+		    ccosf(tmpf);
+  		    ccoshf(tmpf);
+		    cexpf(tmpf);
+	            clogf(tmpf);
+		    csinf(tmpf);
+		    csinhf(tmpf);
+		    csqrtf(tmpf);
+		    ctanf(tmpf);
+		    ctanhf(tmpf);
+		    cpowf(tmpf, tmpf);
+		    typedef __complex__ double double_type; double_type tmpd;
+	            cabs(tmpd);
+		    carg(tmpd);
+		    ccos(tmpd);
+  		    ccosh(tmpd);
+		    cexp(tmpd);
+	            clog(tmpd);
+		    csin(tmpd);
+		    csinh(tmpd);
+		    csqrt(tmpd);
+		    ctan(tmpd);
+		    ctanh(tmpd);
+		    cpow(tmpd, tmpd);
+		    typedef __complex__ long double ld_type; ld_type tmpld;
+	            cabsl(tmpld);
+		    cargl(tmpld);
+		    ccosl(tmpld);
+  		    ccoshl(tmpld);
+		    cexpl(tmpld);
+	            clogl(tmpld);
+		    csinl(tmpld);
+		    csinhl(tmpld);
+		    csqrtl(tmpld);
+		    ctanl(tmpld);
+		    ctanhl(tmpld);
+		    cpowl(tmpld, tmpld);
 
   ;
   return 0;
@@ -15993,104 +15910,6 @@ sed 's/^/| /' conftest.$ac_ext >&5
 ac_c99_complex=no
 fi
 rm -f conftest.err conftest.$ac_objext conftest.$ac_ext
-else
-  if test x$gcc_no_link = xyes; then
-  { { echo "$as_me:$LINENO: error: Link tests are not allowed after GCC_NO_EXECUTABLES." >&5
-echo "$as_me: error: Link tests are not allowed after GCC_NO_EXECUTABLES." >&2;}
-   { (exit 1); exit 1; }; }
-fi
-cat >conftest.$ac_ext <<_ACEOF
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
-/* end confdefs.h.  */
-#include <complex.h>
-	typedef __complex__ float float_type;
-	typedef __complex__ double double_type;
-	typedef __complex__ long double ld_type;
-	volatile float_type tmpf;
-	volatile double_type tmpd;
-	volatile ld_type tmpld;
-	volatile float f;
-	volatile double d;
-	volatile long double ld;
-int
-main ()
-{
-f = cabsf(tmpf);
-	f = cargf(tmpf);
-	tmpf = ccosf(tmpf);
-	tmpf = ccoshf(tmpf);
-	tmpf = cexpf(tmpf);
-	tmpf = clogf(tmpf);
-	tmpf = csinf(tmpf);
-	tmpf = csinhf(tmpf);
-	tmpf = csqrtf(tmpf);
-	tmpf = ctanf(tmpf);
-	tmpf = ctanhf(tmpf);
-	tmpf = cpowf(tmpf, tmpf);
-	d = cabs(tmpd);
-	d = carg(tmpd);
-	tmpd = ccos(tmpd);
-	tmpd = ccosh(tmpd);
-	tmpd = cexp(tmpd);
-	tmpd = clog(tmpd);
-	tmpd = csin(tmpd);
-	tmpd = csinh(tmpd);
-	tmpd = csqrt(tmpd);
-	tmpd = ctan(tmpd);
-	tmpd = ctanh(tmpd);
-	tmpd = cpow(tmpd, tmpd);
-	ld = cabsl(tmpld);
-	ld = cargl(tmpld);
-	tmpld = ccosl(tmpld);
-	tmpld = ccoshl(tmpld);
-	tmpld = cexpl(tmpld);
-	tmpld = clogl(tmpld);
-	tmpld = csinl(tmpld);
-	tmpld = csinhl(tmpld);
-	tmpld = csqrtl(tmpld);
-	tmpld = ctanl(tmpld);
-	tmpld = ctanhl(tmpld);
-	tmpld = cpowl(tmpld, tmpld);
-
-  ;
-  return 0;
-}
-_ACEOF
-rm -f conftest.$ac_objext conftest$ac_exeext
-if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
-  (eval $ac_link) 2>conftest.er1
-  ac_status=$?
-  grep -v '^ *+' conftest.er1 >conftest.err
-  rm -f conftest.er1
-  cat conftest.err >&5
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } &&
-	 { ac_try='test -z "$ac_cxx_werror_flag"
-			 || test ! -s conftest.err'
-  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
-  (eval $ac_try) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); }; } &&
-	 { ac_try='test -s conftest$ac_exeext'
-  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
-  (eval $ac_try) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); }; }; then
-  ac_c99_complex=yes
-else
-  echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-ac_c99_complex=no
-fi
-rm -f conftest.err conftest.$ac_objext \
-      conftest$ac_exeext conftest.$ac_ext
-fi
   fi
   echo "$as_me:$LINENO: result: $ac_c99_complex" >&5
 echo "${ECHO_T}$ac_c99_complex" >&6
@@ -16109,7 +15928,6 @@ echo $ECHO_N "checking for ISO C99 support in <stdio.h>... $ECHO_C" >&6
   echo $ECHO_N "(cached) $ECHO_C" >&6
 else
 
-  if test x$gcc_no_link = xyes; then
   cat >conftest.$ac_ext <<_ACEOF
 /* confdefs.h.  */
 _ACEOF
@@ -16117,15 +15935,15 @@ cat confdefs.h >>conftest.$ac_ext
 cat >>conftest.$ac_ext <<_ACEOF
 /* end confdefs.h.  */
 #include <stdio.h>
-      #include <stdarg.h>
-      void foo(char* fmt, ...)
-      {
-	va_list args; va_start(args, fmt);
-	vfscanf(stderr, "%i", args);
-	vscanf("%i", args);
-	vsnprintf(fmt, 0, "%i", args);
-	vsscanf(fmt, "%i", args);
-      }
+		  #include <stdarg.h>
+                  void foo(char* fmt, ...)
+                  {
+	            va_list args; va_start(args, fmt);
+                    vfscanf(stderr, "%i", args);
+		    vscanf("%i", args);
+                    vsnprintf(fmt, 0, "%i", args);
+                    vsscanf(fmt, "%i", args);
+		  }
 int
 main ()
 {
@@ -16164,68 +15982,6 @@ sed 's/^/| /' conftest.$ac_ext >&5
 ac_c99_stdio=no
 fi
 rm -f conftest.err conftest.$ac_objext conftest.$ac_ext
-else
-  if test x$gcc_no_link = xyes; then
-  { { echo "$as_me:$LINENO: error: Link tests are not allowed after GCC_NO_EXECUTABLES." >&5
-echo "$as_me: error: Link tests are not allowed after GCC_NO_EXECUTABLES." >&2;}
-   { (exit 1); exit 1; }; }
-fi
-cat >conftest.$ac_ext <<_ACEOF
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
-/* end confdefs.h.  */
-#include <stdio.h>
-      #include <stdarg.h>
-      void foo(char* fmt, ...)
-      {
-	va_list args; va_start(args, fmt);
-	vfscanf(stderr, "%i", args);
-	vscanf("%i", args);
-	vsnprintf(fmt, 0, "%i", args);
-	vsscanf(fmt, "%i", args);
-      }
-int
-main ()
-{
-snprintf("12", 0, "%i");
-  ;
-  return 0;
-}
-_ACEOF
-rm -f conftest.$ac_objext conftest$ac_exeext
-if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
-  (eval $ac_link) 2>conftest.er1
-  ac_status=$?
-  grep -v '^ *+' conftest.er1 >conftest.err
-  rm -f conftest.er1
-  cat conftest.err >&5
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } &&
-	 { ac_try='test -z "$ac_cxx_werror_flag"
-			 || test ! -s conftest.err'
-  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
-  (eval $ac_try) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); }; } &&
-	 { ac_try='test -s conftest$ac_exeext'
-  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
-  (eval $ac_try) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); }; }; then
-  ac_c99_stdio=yes
-else
-  echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-ac_c99_stdio=no
-fi
-rm -f conftest.err conftest.$ac_objext \
-      conftest$ac_exeext conftest.$ac_ext
-fi
 
 fi
 
@@ -16239,7 +15995,6 @@ echo $ECHO_N "checking for ISO C99 support in <stdlib.h>... $ECHO_C" >&6
   echo $ECHO_N "(cached) $ECHO_C" >&6
 else
 
-  if test x$gcc_no_link = xyes; then
   cat >conftest.$ac_ext <<_ACEOF
 /* confdefs.h.  */
 _ACEOF
@@ -16247,25 +16002,19 @@ cat confdefs.h >>conftest.$ac_ext
 cat >>conftest.$ac_ext <<_ACEOF
 /* end confdefs.h.  */
 #include <stdlib.h>
-      volatile float f;
-      volatile long double ld;
-      volatile unsigned long long ll;
-      lldiv_t mydivt;
 int
 main ()
 {
 char* tmp;
-      f = strtof("gnu", &tmp);
-      ld = strtold("gnu", &tmp);
-      ll = strtoll("gnu", &tmp, 10);
-      ll = strtoull("gnu", &tmp, 10);
-      ll = llabs(10);
-      mydivt = lldiv(10,1);
-      ll = mydivt.quot;
-      ll = mydivt.rem;
-      ll = atoll("10");
-      _Exit(0);
-
+	    	  strtof("gnu", &tmp);
+		  strtold("gnu", &tmp);
+	          strtoll("gnu", &tmp, 10);
+	          strtoull("gnu", &tmp, 10);
+	          llabs(10);
+		  lldiv(10,1);
+		  atoll("10");
+		  _Exit(0);
+		  lldiv_t mydivt;
   ;
   return 0;
 }
@@ -16300,74 +16049,6 @@ sed 's/^/| /' conftest.$ac_ext >&5
 ac_c99_stdlib=no
 fi
 rm -f conftest.err conftest.$ac_objext conftest.$ac_ext
-else
-  if test x$gcc_no_link = xyes; then
-  { { echo "$as_me:$LINENO: error: Link tests are not allowed after GCC_NO_EXECUTABLES." >&5
-echo "$as_me: error: Link tests are not allowed after GCC_NO_EXECUTABLES." >&2;}
-   { (exit 1); exit 1; }; }
-fi
-cat >conftest.$ac_ext <<_ACEOF
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
-/* end confdefs.h.  */
-#include <stdlib.h>
-      volatile float f;
-      volatile long double ld;
-      volatile unsigned long long ll;
-      lldiv_t mydivt;
-int
-main ()
-{
-char* tmp;
-      f = strtof("gnu", &tmp);
-      ld = strtold("gnu", &tmp);
-      ll = strtoll("gnu", &tmp, 10);
-      ll = strtoull("gnu", &tmp, 10);
-      ll = llabs(10);
-      mydivt = lldiv(10,1);
-      ll = mydivt.quot;
-      ll = mydivt.rem;
-      ll = atoll("10");
-      _Exit(0);
-
-  ;
-  return 0;
-}
-_ACEOF
-rm -f conftest.$ac_objext conftest$ac_exeext
-if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
-  (eval $ac_link) 2>conftest.er1
-  ac_status=$?
-  grep -v '^ *+' conftest.er1 >conftest.err
-  rm -f conftest.er1
-  cat conftest.err >&5
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } &&
-	 { ac_try='test -z "$ac_cxx_werror_flag"
-			 || test ! -s conftest.err'
-  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
-  (eval $ac_try) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); }; } &&
-	 { ac_try='test -s conftest$ac_exeext'
-  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
-  (eval $ac_try) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); }; }; then
-  ac_c99_stdlib=yes
-else
-  echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-ac_c99_stdlib=no
-fi
-rm -f conftest.err conftest.$ac_objext \
-      conftest$ac_exeext conftest.$ac_ext
-fi
 
 fi
 
@@ -16705,7 +16386,6 @@ _ACEOF
 
   fi
 
-  CXXFLAGS="$ac_save_CXXFLAGS"
   ac_ext=c
 ac_cpp='$CPP $CPPFLAGS'
 ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
@@ -17625,7 +17305,7 @@ ac_compiler_gnu=$ac_cv_cxx_compiler_gnu
 
   # Fake what AC_TRY_COMPILE does.  XXX Look at redoing this new-style.
     cat > conftest.$ac_ext << EOF
-#line 17628 "configure"
+#line 17308 "configure"
 int main()
 {
   // NB: _Atomic_word not necessarily int.