Enable macro test for clang compiler

`clang` uses `-fdebug-macro` switch to enable debug-info
for macros.

gdb/testsuite/ChangeLog:

2021-03-19  Sourabh Singh Tomar  <SourabhSingh.Tomar@amd.com>

* gdb.base/info-macros.exp: Append -fdebug-macro to
  additional_flags for clang.
* gdb.base/macscp.exp: Likewise.
* gdb.base/style.exp: Likewise.
* gdb.linespec/macro-relative.exp: Likewise.

5 files changed, 26 insertions, 9 deletions

diff --git a/gdb/testsuite/ChangeLog b/gdb/testsuite/ChangeLog
index c1d7fec6cc4..42484fa588a 100644
--- a/gdb/testsuite/ChangeLog
+++ b/gdb/testsuite/ChangeLog
@@ -1,3 +1,11 @@
+2021-03-19  Sourabh Singh Tomar  <SourabhSingh.Tomar@amd.com>
+
+	* gdb.base/info-macros.exp: Append -fdebug-macro to
+	  additional_flags for clang.
+	* gdb.base/macscp.exp: Likewise.
+	* gdb.base/style.exp: Likewise.
+	* gdb.linespec/macro-relative.exp: Likewise.
+
 2021-03-17  Simon Marchi  <simon.marchi@polymtl.ca>
 	    Pedro Alves  <pedro@palves.net>
 
diff --git a/gdb/testsuite/gdb.base/info-macros.exp b/gdb/testsuite/gdb.base/info-macros.exp
index 90da9dbe16d..c75229f80d9 100644
--- a/gdb/testsuite/gdb.base/info-macros.exp
+++ b/gdb/testsuite/gdb.base/info-macros.exp
@@ -22,15 +22,17 @@ if [using_fission] {
 }
 
 get_compiler_info
-if ![test_compiler_info gcc*] {
-  untested "no compiler info"
-  return -1
+if { [test_compiler_info gcc*] } {
+    # Don't use "debug" here.  Otherwise "-g" would be appended to the gcc
+    # command line, possibly overriding "-g3" (depending on gcc version).
+    set options "additional_flags=-g3"
+} elseif { [test_compiler_info clang*] } {
+    set options "additional_flags=-fdebug-macro"
+} else {
+    untested "no compiler info"
+    return -1
 }
 
-# Don't use "debug" here.  Otherwise "-g" would be appended to the gcc
-# command line, possibly overriding "-g3" (depending on gcc version).
-set options "additional_flags=-g3"
-
 if { [prepare_for_testing "failed to prepare" ${testfile} ${srcfile} $options] } {
     return -1
 }
diff --git a/gdb/testsuite/gdb.base/macscp.exp b/gdb/testsuite/gdb.base/macscp.exp
index 724f7377b57..9d295ad20de 100644
--- a/gdb/testsuite/gdb.base/macscp.exp
+++ b/gdb/testsuite/gdb.base/macscp.exp
@@ -21,8 +21,10 @@ set objfile [standard_output_file ${testfile}.o]
 set options { debug additional_flags=-DFROM_COMMANDLINE=ARG}
 
 get_compiler_info
-if { [test_compiler_info "gcc-*"] || [test_compiler_info "clang-*"] } {
+if { [test_compiler_info "gcc-*"] } {
     lappend options additional_flags=-g3
+} elseif { [test_compiler_info "clang-*"] } {
+    lappend options additional_flags=-fdebug-macro
 }
 
 # Generate the intermediate object file.  This is required by Darwin to
diff --git a/gdb/testsuite/gdb.base/style.exp b/gdb/testsuite/gdb.base/style.exp
index 0754c9daa49..4a3428bc63f 100644
--- a/gdb/testsuite/gdb.base/style.exp
+++ b/gdb/testsuite/gdb.base/style.exp
@@ -21,9 +21,12 @@ standard_testfile
 set test_macros 0
 set options debug
 get_compiler_info
-if { [test_compiler_info "gcc-*"] || [test_compiler_info "clang-*"] } {
+if { [test_compiler_info "gcc-*"] } {
     lappend options additional_flags=-g3
     set test_macros 1
+} elseif { [test_compiler_info "clang-*"] } {
+    lappend options additional_flags=-fdebug-macro
+    set test_macros 1
 }
 
 if {[build_executable "failed to build" $testfile $srcfile $options]} {
diff --git a/gdb/testsuite/gdb.linespec/macro-relative.exp b/gdb/testsuite/gdb.linespec/macro-relative.exp
index 32375e5cb7c..c8e5b29d81f 100644
--- a/gdb/testsuite/gdb.linespec/macro-relative.exp
+++ b/gdb/testsuite/gdb.linespec/macro-relative.exp
@@ -31,6 +31,8 @@ set opts {debug additional_flags=-I.}
 get_compiler_info
 if [test_compiler_info gcc*] {
     lappend opts additional_flags=-g3
+} elseif [test_compiler_info clang*] {
+    lappend opts additional_flags=-fdebug-macro
 }
 
 if { [file pathtype $objdir] == "relative" } {