[PATCH v11 6/7] configure: enable building Wine with LTO

[Konstantin Demin]

From: Konstantin Demin

Signed-off-by: Konstantin Demin 
---
 configure    | 19 +++++++++++++++++++
 configure.ac | 12 ++++++++++++
 2 files changed, 31 insertions(+)

diff --git a/configure b/configure
index 9cf06ce3d0e..e31c5f8b85d 100755
--- a/configure
+++ b/configure
@@ -923,6 +923,7 @@ enable_maintainer_mode
 enable_sast
 enable_silent_rules
 enable_werror
+enable_lto
 with_alsa
 with_capi
 with_coreaudio
@@ -2529,6 +2530,7 @@ Optional Features:
                           Clang
   --enable-silent-rules   use silent build rules (override: "make V=1")
   --enable-werror         treat compilation warnings as errors
+  --enable-lto            build with LTO (EXPERIMENTAL)
   --disable-largefile     omit support for large files
   --disable-year2038      don't support timestamps after 2038

@@ -4349,6 +4351,12 @@ then :
   enableval=$enable_werror;
 fi

+# Check whether --enable-lto was given.
+if test ${enable_lto+y}
+then :
+  enableval=$enable_lto;
+fi
+

# Check whether --with-alsa was given.
@@ -7415,6 +7423,11 @@ do
   esac
 done

+if test "x$enable_lto" = xyes
+then
+    as_fn_append EXTRACFLAGS " -D__WINE_LTO_BUILD"
+fi
+
 for wine_arch in $cross_archs $extra_arch
 do
     case $wine_arch in
@@ -7713,6 +7726,11 @@ fi
     eval LDFLAGS=$${wine_arch}_LDFLAGS
     eval "${wine_arch}_EXTRACFLAGS="-D__WINE_PE_BUILD -Wall""

+    if test "x$enable_lto" = xyes
+    then
+        as_fn_append ${wine_arch}_EXTRACFLAGS " -D__WINE_LTO_BUILD"
+    fi
+
     target=""
     set x $CC
     shift
@@ -22105,6 +22123,7 @@ printf %s "creating Makefile rules..." >&6

makedep_flags=" -C"
 test "x$enable_silent_rules" = xyes && makedep_flags="$makedep_flags -S"
+test "x$enable_lto" = xyes && makedep_flags="$makedep_flags -L"

wine_srcdir=
 test "$srcdir" = . || wine_srcdir="$srcdir/"
diff --git a/configure.ac b/configure.ac
index d1d07bc8f37..e4788293662 100644
--- a/configure.ac
+++ b/configure.ac
@@ -24,6 +24,7 @@ AC_ARG_ENABLE(maintainer-mode, AS_HELP_STRING([--enable-maintainer-mode],[enable
 AC_ARG_ENABLE(sast,  AS_HELP_STRING([--enable-sast],[enable static application security testing using Clang]))
 AC_ARG_ENABLE(silent-rules, AS_HELP_STRING([--enable-silent-rules],[use silent build rules (override: "make V=1")]))
 AC_ARG_ENABLE(werror, AS_HELP_STRING([--enable-werror],[treat compilation warnings as errors]))
+AC_ARG_ENABLE(lto, AS_HELP_STRING([--enable-lto],[build with LTO (EXPERIMENTAL)]))

AC_ARG_WITH(alsa,      AS_HELP_STRING([--without-alsa],[do not use the Alsa sound support]))
 AC_ARG_WITH(capi,      AS_HELP_STRING([--without-capi],[do not use CAPI (ISDN support)]))
@@ -393,6 +394,11 @@ do
   esac
 done

+if test "x$enable_lto" = xyes
+then
+    AS_VAR_APPEND([EXTRACFLAGS],[" -D__WINE_LTO_BUILD"])
+fi
+
 for wine_arch in $cross_archs $extra_arch
 do
     case $wine_arch in
@@ -435,6 +441,11 @@ do
     AS_VAR_COPY([LDFLAGS],[${wine_arch}_LDFLAGS])
     AS_VAR_SET([${wine_arch}_EXTRACFLAGS],["-D__WINE_PE_BUILD -Wall"])

+    if test "x$enable_lto" = xyes
+    then
+        AS_VAR_APPEND([${wine_arch}_EXTRACFLAGS],[" -D__WINE_LTO_BUILD"])
+    fi
+
     target=""
     set x $CC
     shift
@@ -2413,6 +2424,7 @@ AS_ECHO_N("creating Makefile rules...") >&AS_MESSAGE_FD

makedep_flags=" -C"
 test "x$enable_silent_rules" = xyes && makedep_flags="$makedep_flags -S"
+test "x$enable_lto" = xyes && makedep_flags="$makedep_flags -L"

wine_srcdir=
 test "$srcdir" = . || wine_srcdir="$srcdir/"