sourcebuild.texi (dg-add-c99-runtime-options): Document.

gcc/
	* doc/sourcebuild.texi (dg-add-c99-runtime-options): Document.

gcc/testsuite/
	* lib/target-supports.exp (add_options_for_c99_runtime): New procedure.
	* lib/target-supports-dg.exp (dg-add-options): Likewise.
	* gcc.dg/builtins-18.c: Use { dg-add-options c99_runtime } instead of
	target-specific dg-options.
	* gcc.dg/builtins-20.c: Likewise.
	* gcc.dg/builtins-53.c: Likewise.
	* gcc.dg/builtins-55.c: Likewise.
	* gcc.dg/single-precision-constant.c: Likewise.
	* gcc.dg/torture/builtin-convert-1.c: Likewise.
	* gcc.dg/torture/builtin-convert-2.c: Likewise.
	* gcc.dg/torture/builtin-convert-3.c: Likewise.
	* gcc.dg/torture/builtin-convert-4.c: Likewise.
	* gcc.dg/torture/builtin-power-1.c: Likewise.

From-SVN: r128663

gcc/ChangeLog

+2007-09-22  Richard Sandiford  <rsandifo@nildram.co.uk>
+
+	* doc/sourcebuild.texi (dg-add-c99-runtime-options): Document.
+
 2007-09-19  Michael Meissner  <michael.meissner@amd.com>
 
 	* gcc/config/i386/i386.c: Delete trailing whitespace.

gcc/doc/sourcebuild.texi

@@ -973,6 +973,18 @@ This DejaGnu directive provides a list of compiler options, to be used
 if the target system matches @var{selector}, that replace the default
 options used for this set of tests.
 
+@item @{ dg-add-options @var{feature} ... @}
+Add any compiler options that are needed to access certain features.
+This directive does nothing on targets that enable the features by
+default, or that don't provide them at all.  It must come after
+all @code{dg-options} directives.
+
+The supported values of @var{feature} are:
+@table @code
+@item c99_runtime
+The target's C99 runtime (both headers and libraries).
+@end table
+
 @item @{ dg-skip-if @var{comment} @{ @var{selector} @} @{ @var{include-opts} @} @{ @var{exclude-opts} @} @}
 Skip the test if the test system is included in @var{selector} and if
 each of the options in @var{include-opts} is in the set of options with

gcc/testsuite/ChangeLog

+2007-09-22  Richard Sandiford  <rsandifo@nildram.co.uk>
+
+	* lib/target-supports.exp (add_options_for_c99_runtime): New procedure.
+	* lib/target-supports-dg.exp (dg-add-options): Likewise.
+	* gcc.dg/builtins-18.c: Use { dg-add-options c99_runtime } instead of
+	target-specific dg-options.
+	* gcc.dg/builtins-20.c: Likewise.
+	* gcc.dg/builtins-53.c: Likewise.
+	* gcc.dg/builtins-55.c: Likewise.
+	* gcc.dg/single-precision-constant.c: Likewise.
+	* gcc.dg/torture/builtin-convert-1.c: Likewise.
+	* gcc.dg/torture/builtin-convert-2.c: Likewise.
+	* gcc.dg/torture/builtin-convert-3.c: Likewise.
+	* gcc.dg/torture/builtin-convert-4.c: Likewise.
+	* gcc.dg/torture/builtin-power-1.c: Likewise.
+
 2007-09-21  Chao-ying Fu  <fu@mips.com>
 
 	* lib/target-supports.exp (check_effective_target_fixed_point): New to

gcc/testsuite/gcc.dg/builtins-18.c

@@ -7,8 +7,7 @@
 
 /* { dg-do link } */
 /* { dg-options "-O2 -ffast-math" } */
-/* { dg-options "-O2 -ffast-math -mmacosx-version-min=10.3" { target powerpc-*-darwin* } } */
-/* { dg-options "-O2 -ffast-math -std=c99" { target *-*-solaris2* } } */
+/* { dg-add-options c99_runtime } */
 
 #include "builtins-config.h"
 

gcc/testsuite/gcc.dg/builtins-20.c

@@ -7,8 +7,7 @@
 
 /* { dg-do link } */
 /* { dg-options "-O2 -ffast-math" } */
-/* { dg-options "-O2 -ffast-math -mmacosx-version-min=10.3" { target powerpc-*-darwin* } } */
-/* { dg-options "-O2 -ffast-math -std=c99" { target *-*-solaris2* } } */
+/* { dg-add-options c99_runtime } */
 
 #include "builtins-config.h"
 

gcc/testsuite/gcc.dg/builtins-53.c

@@ -10,8 +10,7 @@
 
 /* { dg-do compile } */
 /* { dg-options "-O2 -ffast-math" } */
-/* { dg-options "-O2 -ffast-math -mmacosx-version-min=10.3" { target powerpc-*-darwin* } } */
-/* { dg-options "-O2 -ffast-math -std=c99" { target *-*-solaris2* } } */
+/* { dg-add-options c99_runtime } */
 
 #include "builtins-config.h"
 

gcc/testsuite/gcc.dg/builtins-55.c

 /* { dg-do link } */
 /* { dg-options "-O2 -ffast-math" } */
-/* { dg-options "-ffast-math -mmacosx-version-min=10.3" { target powerpc-*-darwin* } } */
-/* { dg-options "-O2 -ffast-math -std=c99" { target *-*-solaris2* } } */
+/* { dg-add-options c99_runtime } */
 
 #include "builtins-config.h"
 

gcc/testsuite/gcc.dg/single-precision-constant.c

@@ -4,8 +4,7 @@
 
 /* { dg-do run } */
 /* { dg-options "-fsingle-precision-constant" } */
-/* { dg-options "-fsingle-precision-constant -mmacosx-version-min=10.3" { target powerpc-*-darwin* } } */
-/* { dg-options "-fsingle-precision-constant -std=c99" { target *-*-solaris2* } } */
+/* { dg-add-options c99_runtime } */
 
 #include <math.h>
 #include <float.h>

gcc/testsuite/gcc.dg/torture/builtin-convert-1.c

@@ -7,8 +7,7 @@
 
 /* { dg-do link } */
 /* { dg-options "-ffast-math" } */
-/* { dg-options "-ffast-math -mmacosx-version-min=10.3" { target powerpc-*-darwin* } } */
-/* { dg-options "-ffast-math -std=c99" { target *-*-solaris2* } } */
+/* { dg-add-options c99_runtime } */
 
 #include "../builtins-config.h"
 

gcc/testsuite/gcc.dg/torture/builtin-convert-2.c

@@ -7,8 +7,7 @@
 
 /* { dg-do link } */
 /* { dg-options "-ffast-math" } */
-/* { dg-options "-ffast-math -mmacosx-version-min=10.3" { target powerpc-*-darwin* } } */
-/* { dg-options "-ffast-math -std=c99" { target *-*-solaris2* } } */
+/* { dg-add-options c99_runtime } */
 
 #include "../builtins-config.h"
 

gcc/testsuite/gcc.dg/torture/builtin-convert-3.c

@@ -7,8 +7,7 @@
 
 /* { dg-do link } */
 /* { dg-options "-ffast-math" } */
-/* { dg-options "-ffast-math -mmacosx-version-min=10.3" { target powerpc-*-darwin* } } */
-/* { dg-options "-ffast-math -std=c99" { target *-*-solaris2* } } */
+/* { dg-add-options c99_runtime } */
 
 #include "../builtins-config.h"
 

gcc/testsuite/gcc.dg/torture/builtin-convert-4.c

@@ -7,8 +7,7 @@
 
 /* { dg-do compile } */
 /* { dg-options "-ftrapping-math -fdump-tree-original" } */
-/* { dg-options "-ftrapping-math -fdump-tree-original -mmacosx-version-min=10.3" { target powerpc-*-darwin* } } */
-/* { dg-options "-ftrapping-math -fdump-tree-original -std=c99" { target *-*-solaris2* } } */
+/* { dg-add-options c99_runtime } */
 
 #include "../builtins-config.h"
 

gcc/testsuite/gcc.dg/torture/builtin-power-1.c

@@ -7,8 +7,7 @@
 
 /* { dg-do link } */
 /* { dg-options "-ffast-math" } */
-/* { dg-options "-ffast-math -mmacosx-version-min=10.3" { target powerpc-*-darwin* } } */
-/* { dg-options "-ffast-math -std=c99" { target *-*-solaris2* } } */
+/* { dg-add-options c99_runtime } */
 
 #include "../builtins-config.h"
 

gcc/testsuite/lib/target-supports-dg.exp

@@ -162,6 +162,22 @@ proc dg-require-host-local { args } {
     }
 }
 
+# Add any target-specific flags needed for accessing the given list
+# of features.  This must come after all dg-options.
+
+proc dg-add-options { args } {
+    upvar dg-extra-tool-flags extra-tool-flags
+
+    foreach arg [lrange $args 1 end] {
+	if { [info procs add_options_for_$arg] != "" } {
+	    set extra-tool-flags \
+		[eval [list add_options_for_$arg ${extra-tool-flags}]]
+	} else {
+	    error "Unrecognized option type: $arg"
+	}
+    }
+}
+
 # Check the flags with which the test will be run against options in
 # a test directive that will skip or xfail that test.  The DejaGnu proc
 # check_conditional_xfail will look at the options in compiler_flags, so

gcc/testsuite/lib/target-supports.exp

@@ -2562,3 +2562,15 @@ proc check_effective_target_wchar { } {
 	#include <wchar.h>
     }]
 }
+
+# Add to FLAGS all the target-specific flags needed to access the c99 runtime.
+
+proc add_options_for_c99_runtime { flags } {
+    if { [istarget *-*-solaris2*] } {
+	return "$flags -std=c99"
+    }
+    if { [istarget powerpc-*-darwin*] } {
+	return "$flags -mmacosx-version-min=10.3"
+    }
+    return $flags
+}