[PATCH] testsuite: Verify that module-mapper is avialable

[Torbjörn SVENSSON via Gcc-patches]

For some test cases, it's required that the optional module mapper
"g++-mapper-server" is built. As the server is not required, the
test cases will fail if it can't be found.

gcc/testsuite/ChangeLog:

        * lib/target-supports.exp (check_is_prog_name_available):
        New.
        * lib/target-supports-dg.exp
        (dg-require-prog-name-available): New.
        * g++.dg/modules/modules.exp: Verify avilability of module
        mapper.

Signed-off-by: Torbjörn SVENSSON  <torbjorn.svens...@foss.st.com>
---
 gcc/testsuite/g++.dg/modules/modules.exp | 31 ++++++++++++++++++++++++
 gcc/testsuite/lib/target-supports-dg.exp | 15 ++++++++++++
 gcc/testsuite/lib/target-supports.exp    | 15 ++++++++++++
 3 files changed, 61 insertions(+)

diff --git a/gcc/testsuite/g++.dg/modules/modules.exp 
b/gcc/testsuite/g++.dg/modules/modules.exp
index afb323d0efd..4784803742a 100644
--- a/gcc/testsuite/g++.dg/modules/modules.exp
+++ b/gcc/testsuite/g++.dg/modules/modules.exp
@@ -279,6 +279,29 @@ proc module-init { src } {
     return $option_list
 }
 
+# Return 1 if requirements are met
+proc module-check-requirements { tests } {
+    foreach test $tests {
+       set tmp [dg-get-options $test]
+       foreach op $tmp {
+           switch [lindex $op 0] {
+               "dg-additional-options" {
+                   # Example strings to match:
+                   # -fmodules-ts -fmodule-mapper=|@g++-mapper-server\\ -t\\ 
[srcdir]/inc-xlate-1.map
+                   # -fmodules-ts -fmodule-mapper=|@g++-mapper-server
+                   if [regexp -- {(^| )-fmodule-mapper=\|@([^\\ ]*)} [lindex 
$op 2] dummy dummy2 prog] {
+                       verbose "Checking that mapper exist: $prog"
+                       if { ![ check_is_prog_name_available $prog ] } {
+                           return 0
+                       }
+                   }
+               }
+           }
+       }
+    }
+    return 1
+}
+
 # cleanup any detritus from previous run
 cleanup_module_files [find $DEFAULT_REPO *.gcm]
 
@@ -307,6 +330,14 @@ foreach src [lsort [find $srcdir/$subdir {*_a.[CHX}]] {
        set tests [lsort [find [file dirname $src] \
                              [regsub {_a.[CHX]$} [file tail $src] 
{_[a-z].[CHX]}]]]
 
+       if { ![module-check-requirements $tests] } {
+           set testcase [regsub {_a.[CH]} $src {}]
+           set testcase \
+               [string range $testcase [string length "$srcdir/"] end]
+           unsupported $testcase
+           continue
+       }
+
        set std_list [module-init $src]
        foreach std $std_list {
            set mod_files {}
diff --git a/gcc/testsuite/lib/target-supports-dg.exp 
b/gcc/testsuite/lib/target-supports-dg.exp
index aa2164bc789..6ce3b2b1a1b 100644
--- a/gcc/testsuite/lib/target-supports-dg.exp
+++ b/gcc/testsuite/lib/target-supports-dg.exp
@@ -683,3 +683,18 @@ proc dg-require-symver { args } {
        set dg-do-what [list [lindex ${dg-do-what} 0] "N" "P"]
     }
 }
+
+# If this target does not provide prog named "$args", skip this test.
+
+proc dg-require-prog-name-available { args } {
+    # The args are within another list; pull them out.
+    set args [lindex $args 0]
+
+    set prog [lindex $args 1]
+
+    if { ![ check_is_prog_name_available $prog ] } {
+        upvar dg-do-what dg-do-what
+        set dg-do-what [list [lindex ${dg-do-what} 0] "N" "P"]
+    }
+}
+
diff --git a/gcc/testsuite/lib/target-supports.exp 
b/gcc/testsuite/lib/target-supports.exp
index 703aba412a6..c3b7a6c17b3 100644
--- a/gcc/testsuite/lib/target-supports.exp
+++ b/gcc/testsuite/lib/target-supports.exp
@@ -11928,3 +11928,18 @@ main:
        .byte 0
   } ""]
 }
+ 
+# Return 1 if this target has prog named "$prog", 0 otherwise.
+
+proc check_is_prog_name_available { prog } {
+    global tool
+
+    set options [list "additional_flags=-print-prog-name=$prog"]
+    set output [lindex [${tool}_target_compile "" "" "none" $options] 0]
+
+    if { $output == $prog } {
+        return 0
+    }
+
+    return 1
+}
-- 
2.25.1