File 0453-Speed-up-compilation.patch of Package erlang

From a6a9a16dbf1ad5eb49b4f72a8073def5e0566485 Mon Sep 17 00:00:00 2001
From: Dan Gudmundsson <dgud@erlang.org>
Date: Tue, 28 May 2019 14:42:38 +0200
Subject: [PATCH 3/3] Speed up compilation

Decreases compilation time without reducing performance.
---
 lib/wx/c_src/Makefile.in | 15 +++++++++++----
 lib/wx/configure.in      | 19 +++++++++++++++----
 2 files changed, 26 insertions(+), 8 deletions(-)

diff --git a/lib/wx/c_src/Makefile.in b/lib/wx/c_src/Makefile.in
index 8ec64bea7e..daadf5e785 100644
--- a/lib/wx/c_src/Makefile.in
+++ b/lib/wx/c_src/Makefile.in
@@ -70,7 +70,7 @@ else
 RC_FILE     = 
 endif
 
-WX_OBJECTS  = $(GENERAL_O) $(GENERATED_O) $(RC_FILE)
+WX_OBJECTS  =  $(GENERATED_O) $(GENERAL_O) $(RC_FILE)
 
 OBJECTS = $(WX_OBJECTS) $(GL_OBJECTS)
 
@@ -86,7 +86,7 @@ LD		= $(CXX)
 LDFLAGS		= @LDFLAGS@
 RESCOMP		= @WX_RESCOMP@
 
-ifeq (@WX_HAVE_STATIC_LIBS@,true) 
+ifeq (@WX_HAVE_STATIC_LIBS@,true)
 OPT_WX_LIBS      =  @WX_LIBS_STATIC@
 DEBUG_WX_LIBS    =  @DEBUG_WX_LIBS_STATIC@
 else
@@ -97,14 +97,16 @@ endif
 ifeq ($(TYPE),debug)
 WX_CFLAGS	= @DEBUG_WX_CFLAGS@
 CFLAGS          = @DEBUG_CFLAGS@
-WX_CXX_FLAGS	= @DEBUG_WX_CXXFLAGS@ 
+WX_CXX_FLAGS	= @DEBUG_WX_CXXFLAGS@
 CXX_FLAGS       = @DEBUG_CXXFLAGS@
+CXX_NO_OPT_FLAGS = @DEBUG_CXXFLAGS@
 WX_LIBS		= $(DEBUG_WX_LIBS)
 else
 WX_CFLAGS	= @WX_CFLAGS@
 CFLAGS          = @CFLAGS@
-WX_CXX_FLAGS	= @WX_CXXFLAGS@ 
+WX_CXX_FLAGS	= @WX_CXXFLAGS@
 CXX_FLAGS       = @CXXFLAGS@
+CXX_NO_OPT_FLAGS = @CXXNOOPTFLAGS@
 WX_LIBS		= $(OPT_WX_LIBS)
 endif
 
@@ -113,6 +115,7 @@ GL_LIBS         = @GL_LIBS@
 CC_O		= $(V_CC) -c $(CFLAGS) $(WX_CFLAGS) $(COMMON_CFLAGS)
 OBJC_CC_O	= $(OBJC_CC) -c $(CFLAGS) $(OBJC_CFLAGS) $(WX_CFLAGS) $(COMMON_CFLAGS)
 CXX_O		= $(V_CXX) -c $(CXX_FLAGS) $(WX_CXX_FLAGS)  $(COMMON_CFLAGS)
+CXX_O_NO_OPT    = $(V_CXX) -c $(CXX_NO_OPT_FLAGS) $(WX_CXX_FLAGS)  $(COMMON_CFLAGS)
 
 # Targets
 
@@ -152,6 +155,10 @@ $(SYS_TYPE)/wxe_ps_init.o: wxe_ps_init.c
 	$(V_at)mkdir -p $(SYS_TYPE)
 	$(cc_verbose)$(OBJC_CC_O) $< -o $@
 
+$(SYS_TYPE)/wxe_funcs.o: gen/wxe_funcs.cpp
+	$(V_at)mkdir -p $(SYS_TYPE)
+	$(CXX_O_NO_OPT) $< -o $@
+
 $(SYS_TYPE)/%.o: gen/%.cpp 
 	$(V_at)mkdir -p $(SYS_TYPE)
 	$(CXX_O) $< -o $@
diff --git a/lib/wx/configure.in b/lib/wx/configure.in
index 60f0a52ef3..f35e6cdbd0 100644
--- a/lib/wx/configure.in
+++ b/lib/wx/configure.in
@@ -229,11 +229,21 @@ case $host_os in
 	;;
     *)
 	DEBUG_CFLAGS="-g -Wall -fPIC $CFLAGS -DDEBUG"
-	CFLAGS="-g -Wall -O2 -fPIC $CFLAGS -fomit-frame-pointer -fno-strict-aliasing"
+	CFLAGS="-Wall -fPIC $CFLAGS -fomit-frame-pointer -fno-strict-aliasing"
 	;;
 esac
 
-dnl  
+dnl
+dnl  Use -O1 -fno-move-loop-invariants for wxe_funcs.cpp to reduce
+dnl  compilation time
+dnl
+
+if test "x$GCC" = xyes -a X"$host_os" != X"win32" ; then
+   CXXNOOPT="-O1"
+   LM_TRY_ENABLE_CFLAG([-fno-move-loop-invariants], [CXXNOOPT])
+fi
+
+dnl
 dnl  Opengl tests
 dnl
 
@@ -288,13 +298,13 @@ AC_SUBST(GL_LIBS)
 DEBUG_CXXFLAGS="$CXXFLAGS $DEBUG_CFLAGS $CPPFLAGS"
 DEBUG_CFLAGS="$DEBUG_CFLAGS $CPPFLAGS $C_ONLY_FLAGS"
 
-CXXFLAGS="$CXXFLAGS $CFLAGS $CPPFLAGS" 
+CXXNOOPTFLAGS="$CXXFLAGS $CFLAGS $CPPFLAGS $CXXNOOPT"
+CXXFLAGS="$CXXFLAGS $CFLAGS $CPPFLAGS"
 CFLAGS="$CFLAGS $CPPFLAGS $C_ONLY_FLAGS"
 
 AC_SUBST(DEBUG_CFLAGS)
 AC_SUBST(DEBUG_CXXFLAGS)
 
-
 ERLC=erlc
 ERL=erl
 ERLANG_ROOT_DIR=$ERL_TOP
@@ -691,6 +701,7 @@ esac
 
 AC_SUBST(SO_EXT)
 AC_SUBST(RUN_ERL)
+AC_SUBST(CXXNOOPTFLAGS)
 
 
 if test X"$WX_BUILDING_INSIDE_ERLSRC" != X"true" ; then
-- 
2.16.4