configure/Makefile: add option to generate pdb symbols

Recent versions of Windows clang and LLVM's lld have the ability to
build Windows PDB symbols for debugging so add an explicit option to
test for support and use it so.

Signed-off-by: Sitsofe Wheeler <sitsofe@yahoo.com>

1 files changed, 28 insertions, 0 deletions

diff --git a/configure b/configure
index 43433657..355b6958 100755
--- a/configure
+++ b/configure
@@ -193,6 +193,8 @@ for opt do
   ;;
   --target-win-ver=*) target_win_ver="$optarg"
   ;;
+  --enable-pdb) pdb="yes"
+  ;;
   --build-static) build_static="yes"
   ;;
   --enable-gfio) gfio_check="yes"
@@ -256,6 +258,7 @@ if test "$show_help" = "yes" ; then
   echo "--extra-cflags=         Specify extra CFLAGS to pass to compiler"
   echo "--build-32bit-win       Enable 32-bit build on Windows"
   echo "--target-win-ver=       Minimum version of Windows to target (XP or 7)"
+  echo "--enable-pdb            Enable Windows PDB symbols generation (needs clang/lld)"
   echo "--build-static          Build a static fio"
   echo "--esx                   Configure build options for esx"
   echo "--enable-gfio           Enable building of gtk gfio"
@@ -2702,6 +2705,27 @@ if compile_prog "" "" "statx_syscall"; then
 fi
 print_config "statx(2)/syscall" "$statx_syscall"
 
+##########################################
+# check for Windows PDB generation support
+if test "pdb" != "no" ; then
+  cat > $TMPC <<EOF
+int main(void)
+{
+  return 0;
+}
+EOF
+  if compile_prog "-g -gcodeview" "-fuse-ld=lld -Wl,-pdb,$TMPO" "pdb"; then
+    pdb=yes
+  else
+    if test "$pdb" = "yes"; then
+      feature_not_found "PDB" "clang and lld"
+    fi
+    pdb=no
+  fi
+else
+  pdb=no
+fi
+print_config "Windows PDB generation" "$pdb"
 #############################################################################
 
 if test "$wordsize" = "64" ; then
@@ -3024,6 +3048,10 @@ fi
 if test "$dynamic_engines" = "yes" ; then
   output_sym "CONFIG_DYNAMIC_ENGINES"
 fi
+if test "$pdb" = yes; then
+  output_sym "CONFIG_PDB"
+fi
+
 print_config "Lib-based ioengines dynamic" "$dynamic_engines"
 cat > $TMPC << EOF
 int main(int argc, char **argv)