From 8d70a9f0938b9e9efc4fd2eee80cf806b5e97a4a Mon Sep 17 00:00:00 2001
From: Andrew Burgess <andrew.burgess@embecosm.com>
Date: Wed, 27 Nov 2019 21:51:35 +0000
Subject: [PATCH] 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
---
 gdb/testsuite/ChangeLog                     |  7 +++++++
 gdb/testsuite/gdb.mi/mi-fortran-modules.exp |  2 +-
 gdb/testsuite/lib/gdb.exp                   | 10 ++++++++++
 3 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/gdb/testsuite/ChangeLog b/gdb/testsuite/ChangeLog
index 8df282c6b83..173e82d5964 100644
--- a/gdb/testsuite/ChangeLog
+++ b/gdb/testsuite/ChangeLog
@@ -1,3 +1,10 @@
+2019-12-04  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.
+
 2019-12-04  Andrew Burgess  <andrew.burgess@embecosm.com>
 
 	* gdb.fortran/type-kinds.exp (test_cast_1_to_type_kind): Handle
diff --git a/gdb/testsuite/gdb.mi/mi-fortran-modules.exp b/gdb/testsuite/gdb.mi/mi-fortran-modules.exp
index 12a81a68695..df48324784b 100644
--- a/gdb/testsuite/gdb.mi/mi-fortran-modules.exp
+++ b/gdb/testsuite/gdb.mi/mi-fortran-modules.exp
@@ -22,7 +22,7 @@ set MIFLAGS "-i=mi"
 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 4682f5d2f8f..aa774462d25 100644
--- a/gdb/testsuite/lib/gdb.exp
+++ b/gdb/testsuite/lib/gdb.exp
@@ -3719,6 +3719,16 @@ proc gdb_compile {source dest type options} {
     } 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
-- 
2.30.2