libstdc++.exp (libstdc++_init): Set v3-libgomp.

2008-07-31  Paolo Carlini  <paolo.carlini@oracle.com>

	* testsuite/lib/libstdc++.exp (libstdc++_init): Set v3-libgomp.
	(check_v3_target_parallel_mode): Robustify, just follow the
	structure of testsuite/Makefile.am.

From-SVN: r138428

libstdc++-v3/ChangeLog

+2008-07-31  Paolo Carlini  <paolo.carlini@oracle.com>
+
+	* testsuite/lib/libstdc++.exp (libstdc++_init): Set v3-libgomp.
+	(check_v3_target_parallel_mode): Robustify, just follow the
+	structure of testsuite/Makefile.am.
+
 2008-07-29  Paolo Carlini  <paolo.carlini@oracle.com>
 
 	* include/debug/set.h: Minor formatting fixes.

libstdc++-v3/testsuite/lib/libstdc++.exp

@@ -81,7 +81,7 @@ proc v3-copy-files {srcfiles} {
 # Called once, during runtest.exp setup.
 proc libstdc++_init { testfile } {
     global env
-    global v3-sharedlib 
+    global v3-sharedlib v3-libgomp
     global srcdir blddir objdir tool_root_dir
     global cc cxx cxxflags cxxpchflags cxxldflags
     global includes
@@ -135,10 +135,13 @@ proc libstdc++_init { testfile } {
     v3track gccdir 3
 
     # Locate libgomp. This is only required for parallel mode.
+    set v3-libgomp 0
     set libgompdir [lookfor_file $blddir/../libgomp .libs/libgomp.so]
     if {$libgompdir != ""} {
+	set v3-libgomp 1
         set libgompdir [file dirname $libgompdir]
 	append ld_library_path_tmp ":${libgompdir}"
+	verbose -log "libgomp support detected"
     }
     v3track libgompdir 3
 
@@ -968,7 +971,7 @@ proc check_v3_target_debug_mode { } {
 
 proc check_v3_target_parallel_mode { } {
     global cxxflags
-    global DEFAULT_CXXFLAGS
+    global v3-libgomp
     global et_parallel_mode
 
     global tool	
@@ -993,29 +996,9 @@ proc check_v3_target_parallel_mode { } {
     } else {
 	set et_parallel_mode 0
 
-	# Set up and compile a C++ test program that depends
-	# on parallel mode working.
-	set src parallel_mode[pid].cc
-	set exe parallel_mode[pid].exe
-
-	set f [open $src "w"]
-	puts $f "#include <omp.h>"
-	puts $f "int main()"
-	puts $f "{ return 0; }"
-	close $f
-
-	set cxxflags_saved $cxxflags
-	set cxxflags "$cxxflags $DEFAULT_CXXFLAGS -Werror"
-
-	set lines [v3_target_compile $src $exe executable ""]
-	set cxxflags $cxxflags_saved
-	file delete $src
-
-	if [string match "" $lines] {
-	    # No error message, compilation succeeded.
+	# If 'make check-parallel' is running the test succeeds.
+	if { ${v3-libgomp} == 1 && [regexp "libgomp" $cxxflags] } {
 	    set et_parallel_mode 1
-	} else {
-	    verbose "check_v3_target_parallel_mode: compilation failed" 2
 	}
     }
     verbose "check_v3_target_parallel_mode: $et_parallel_mode" 2