[PATCH 2/3] debuginfo: check whether compiler needs -fdebug-macro

[Mark Wielaard <mark@klomp.org>]

Some compilers only generate a .debug_macro section when given the
-fdebug_macro flag.

Signed-off-by: Mark Wielaard <mark@klomp.org>
---
 configure.ac       | 13 +++++++++++++
 tests/atlocal.in   |  1 +
 tests/debugedit.at |  6 +++---
 3 files changed, 17 insertions(+), 3 deletions(-)

diff --git a/configure.ac b/configure.ac
index c887aed..79803dc 100644
--- a/configure.ac
+++ b/configure.ac
@@ -135,6 +135,19 @@ else
 fi
 AC_SUBST([GZ_NONE_FLAG])
 
+AC_CACHE_CHECK([whether compiler needs -fdebug-macro], ac_cv_debug_macro, [dnl
+save_CFLAGS="$CFLAGS"
+CFLAGS="-fdebug-macro"
+AC_LINK_IFELSE([AC_LANG_PROGRAM()], ac_cv_debug_macro=yes, ac_cv_debug_macro=no)
+CFLAGS="$save_CFLAGS"
+])
+if test "$ac_cv_debug_macro" = "yes"; then
+  DEBUG_MACRO_FLAG="-fdebug-macro"
+else
+  DEBUG_MACRO_FLAG=""
+fi
+AC_SUBST([DEBUG_MACRO_FLAG])
+
 # And generate the output files.
 AC_CONFIG_FILES([Makefile])
 AC_OUTPUT
diff --git a/tests/atlocal.in b/tests/atlocal.in
index d916301..01b998c 100644
--- a/tests/atlocal.in
+++ b/tests/atlocal.in
@@ -14,3 +14,4 @@ READELF="@READELF@"
 GDWARF_5_FLAG=@GDWARF_5_FLAG@
 GZ_NONE_FLAG=@GZ_NONE_FLAG@
 DWARF_5_DEBUGLINE=@DWARF_5_DEBUGLINE@
+DEBUG_MACRO_FLAG=@DEBUG_MACRO_FLAG@
diff --git a/tests/debugedit.at b/tests/debugedit.at
index 0601127..19ab7dc 100644
--- a/tests/debugedit.at
+++ b/tests/debugedit.at
@@ -611,7 +611,7 @@ AT_CLEANUP
 # ===
 AT_SETUP([debugedit .debug_macro objects])
 AT_KEYWORDS([debuginfo] [debugedit])
-DEBUGEDIT_SETUP
+DEBUGEDIT_SETUP([$DEBUG_MACRO_FLAG])
 
 # We expect 3 for each compile unit.
 AT_DATA([expout],
@@ -636,7 +636,7 @@ AT_CLEANUP
 # ===
 AT_SETUP([debugedit .debug_macro partial])
 AT_KEYWORDS([debuginfo] [debugedit])
-DEBUGEDIT_SETUP
+DEBUGEDIT_SETUP([$DEBUG_MACRO_FLAG])
 
 # We expect 3 for each compile unit.
 AT_DATA([expout],
@@ -659,7 +659,7 @@ AT_CLEANUP
 # ===
 AT_SETUP([debugedit .debug_macro exe])
 AT_KEYWORDS([debuginfo] [debugedit])
-DEBUGEDIT_SETUP
+DEBUGEDIT_SETUP([$DEBUG_MACRO_FLAG])
 
 # We expect 3 for each compile unit.
 AT_DATA([expout],
-- 
2.31.1