[gdb/testsuite] Handle ada in gdb_compile_shlib

The single test-case in the testsuite that creates an ada shared library is
gdb.ada/catch_ex_std.exp.

The test-case does use gdb_compile_shlib, but with a few tweaks that make sure
things are properly handled for ada.

Move the ada-specific code to gdb_compile_shlib, such that gdb_compile_sh can
be used for ada shared libs without tweaks.

Tested on x86_64-linux.

gdb/testsuite/ChangeLog:

2020-12-13  Tom de Vries  <tdevries@suse.de>

	* lib/gdb.exp (gdb_compile_shlib): Handle ada.
	* gdb.ada/catch_ex_std.exp: Use gdb_compile_shlib to compile from
	source to shared lib.  Add ada to options.

gdb/testsuite/ChangeLog

@@ -1,3 +1,9 @@
+2020-12-13  Tom de Vries  <tdevries@suse.de>
+
+	* lib/gdb.exp (gdb_compile_shlib): Handle ada.
+	* gdb.ada/catch_ex_std.exp: Use gdb_compile_shlib to compile from
+	source to shared lib.  Add ada to options.
+
 2020-12-13  Tom de Vries  <tdevries@suse.de>
 
 	* gdb.ada/catch_ex_std.exp: Use gnatmake -bargs and -largs instead of

gdb/testsuite/gdb.ada/catch_ex_std.exp

@@ -24,28 +24,13 @@ if { [skip_ada_tests] } { return -1 }
 standard_ada_testfile foo
 
 set srcfile2 [file join [file dirname $srcfile] some_package.adb]
-set ofile2 [standard_output_file some_package.o]
 set sofile [standard_output_file libsome_package.so]
 
 set outdir [file dirname $binfile]
 
-# To make an Ada shared library we have to jump through a number of
-# hoops.
-
-# First compile to a .o.  We can't compile directly to a .so because
-# GCC rejects that:
-#    $ gcc -g -shared -fPIC -o qqz.o some_package.adb
-#    gcc: error: -c or -S required for Ada
-# And, we can't compile in "ada" mode because dejagnu will try to
-# invoke gnatmake, which we don't want.
-if {[target_compile_ada_from_dir $outdir $srcfile2 $ofile2 \
-	 object {debug additional_flags=-fPIC}] != ""} {
-    return -1
-}
-
-# Now turn the .o into a shared library.
-if {[gdb_compile_shlib $ofile2 $sofile \
-	 {debug additional_flags=-fPIC}] != ""} {
+# Create the shared library.
+if {[gdb_compile_shlib $srcfile2 $sofile \
+	 {ada debug additional_flags=-fPIC}] != ""} {
     return -1
 }
 

gdb/testsuite/lib/gdb.exp

@@ -4286,6 +4286,11 @@ proc gdb_compile_pthreads {source dest type options} {
 proc gdb_compile_shlib {sources dest options} {
     set obj_options $options
 
+    set ada 0
+    if { [lsearch -exact $options "ada"] >= 0 } {
+	set ada 1
+    }
+
     set info_options ""
     if { [lsearch -exact $options "c++"] >= 0 } {
 	set info_options "c++"
@@ -4324,19 +4329,45 @@ proc gdb_compile_shlib {sources dest options} {
     set outdir [file dirname $dest]
     set objects ""
     foreach source $sources {
-	set sourcebase [file tail $source]
 	if {[file extension $source] == ".o"} {
 	    # Already a .o file.
 	    lappend objects $source
-	} elseif {[gdb_compile $source "${outdir}/${sourcebase}.o" object \
-		       $obj_options] != ""} {
-	    return -1
-	} else {
-	    lappend objects ${outdir}/${sourcebase}.o
+	    continue
 	}
+	
+	set sourcebase [file tail $source]
+
+	if { $ada } {
+	    # Gnatmake doesn't like object name foo.adb.o, use foo.o.
+	    set sourcebase [file rootname $sourcebase]
+	}
+	set object ${outdir}/${sourcebase}.o
+
+	if { $ada } {
+	    # Use gdb_compile_ada_1 instead of gdb_compile_ada to avoid the
+	    # PASS message.
+	    if {[gdb_compile_ada_1 $source $object object \
+		     $obj_options] != ""} {
+		return -1
+	    }
+	} else {
+	    if {[gdb_compile $source $object object \
+		     $obj_options] != ""} {
+		return -1
+	    }
+	}
+
+	lappend objects $object
     }
 
     set link_options $options
+    if { $ada } {
+	# If we try to use gnatmake for the link, it will interpret the
+	# object file as an .adb file.  Remove ada from the options to
+	# avoid it.
+	set idx [lsearch $link_options "ada"]
+	set link_options [lreplace $link_options $idx $idx]
+    }
     if [test_compiler_info "xlc-*"] {
 	lappend link_options "additional_flags=-qmkshrobj"
     } else {