[review] gdb/testsuite: Use -J option when compiling Fortran tests

[Andrew Burgess (Code Review)]

Change URL: https://gnutoolchain-gerrit.osci.io/r/c/binutils-gdb/+/733
......................................................................

gdb/testsuite: Use -J option when compiling Fortran tests

When compiling Fortran tests (e.g. gdb.fortran/info-modules.exp), the
Fotran compile produces .mod files.  These files contain details of
compiled modules that are then consumed by the compiler when compiling
other files that USE a module.

Currently the compiler writes the .mod files into its current
directory, so for us this turns out to be 'build/gdb/testsuite/'.
This means that .mod files can be shared between tests, which seems
against the spirit of the GDB testsuite; source files should be
compiled fresh for each test.

This commit adds the -J option to the compiler flags whenever we
compile a Fortran file, this option tells the compiler where to write,
and look for, .mod files.

After this commit there was one Fortran test that needed fixing, with
that fix in place all of the Fortran tests pass again, but now the
.mod files are now produced in the per-test output directories.

gdb/testsuite/ChangeLog:

	* lib/gdb.exp (gdb_compile): Add -J compiler option when building
	Fortran tests.
	* gdb.mi/mi-fortran-modules.exp: Compile source files in correct
	order.

Change-Id: I99444cf22d80e320093d3f3ed9abb8825f378e0b
---
M gdb/testsuite/ChangeLog
M gdb/testsuite/gdb.mi/mi-fortran-modules.exp
M gdb/testsuite/lib/gdb.exp
3 files changed, 18 insertions(+), 1 deletion(-)



diff --git a/gdb/testsuite/ChangeLog b/gdb/testsuite/ChangeLog
index 86f2130..3f67f73 100644
--- a/gdb/testsuite/ChangeLog
+++ b/gdb/testsuite/ChangeLog
@@ -1,3 +1,10 @@
+2019-11-28  Andrew Burgess  <andrew.burgess@embecosm.com>
+
+	* lib/gdb.exp (gdb_compile): Add -J compiler option when building
+	Fortran tests.
+	* gdb.mi/mi-fortran-modules.exp: Compile source files in correct
+	order.
+
 2019-11-27  Andrew Burgess  <andrew.burgess@embecosm.com>
 
 	* gdb.fortran/info-modules.exp: Compile source files in correct
diff --git a/gdb/testsuite/gdb.mi/mi-fortran-modules.exp b/gdb/testsuite/gdb.mi/mi-fortran-modules.exp
index 640bb12..e979ab5 100644
--- a/gdb/testsuite/gdb.mi/mi-fortran-modules.exp
+++ b/gdb/testsuite/gdb.mi/mi-fortran-modules.exp
@@ -22,7 +22,7 @@
 standard_testfile "mi-fortran-modules.f90" "mi-fortran-modules-2.f90"
 
 if {[prepare_for_testing "failed to prepare" ${testfile} \
-	 [list $srcfile $srcfile2] {debug f90}]} {
+	 [list $srcfile2 $srcfile] {debug f90}]} {
     return -1
 }
 
diff --git a/gdb/testsuite/lib/gdb.exp b/gdb/testsuite/lib/gdb.exp
index 828c91d..e743f11 100644
--- a/gdb/testsuite/lib/gdb.exp
+++ b/gdb/testsuite/lib/gdb.exp
@@ -3719,6 +3719,16 @@
     } else {
 	set new_options [universal_compile_options]
     }
+
+    # Place (and look for) Fortran `.mod` files in the output
+    # directory for this specific test.
+    if {[lsearch -exact $options f77] != -1 \
+	    || [lsearch -exact $options f90] != -1 } {
+	# Fortran compile.
+	set mod_path [standard_output_file ""]
+	lappend new_options "additional_flags=-J${mod_path}"
+    }
+
     set shlib_found 0
     set shlib_load 0
     set getting_compiler_info 0

-- 
Gerrit-Project: binutils-gdb
Gerrit-Branch: master
Gerrit-Change-Id: I99444cf22d80e320093d3f3ed9abb8825f378e0b
Gerrit-Change-Number: 733
Gerrit-PatchSet: 1
Gerrit-Owner: Andrew Burgess <andrew.burgess@embecosm.com>
Gerrit-MessageType: newchange