patch 9.1.0622: MS-Windows: mingw-build can be optimized
Problem: MS-Windows: mingw-build can be optimized
Solution: use --gc-sections to reduce the size of the executable
(Ken Takata)
Use the --gc-sections linker option and the -ffunction-sections compiler
option to reduce the size of the executable files. To make these work,
the -fno-asynchronous-unwind-tables compiler option is also needed.
This is enabled by default and can be disabled by `USE_GC_SECTIONS=no`.
Note: A similar feature has been already used in MSVC. (The /OPT linker
option.)
related: #15350
Signed-off-by: Ken Takata <kentkt@csc.jp>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/Make_cyg_ming.mak b/src/Make_cyg_ming.mak
index 911adb5..a0c10b1 100644
--- a/src/Make_cyg_ming.mak
+++ b/src/Make_cyg_ming.mak
@@ -130,7 +130,6 @@
STATIC_STDCPLUS=no
endif
-
# Link against the shared version of libwinpthread by default. Set
# STATIC_WINPTHREAD to "yes" to link against static version instead.
ifndef STATIC_WINPTHREAD
@@ -140,6 +139,12 @@
# This is used when STATIC_STDCPLUS=yes.
HAS_GCC_EH=yes
+# Reduce the size of the executables by using the --gc-sections linker
+# option. Set USE_GC_SECTIONS to "no" if you see any issues with this.
+ifndef USE_GC_SECTIONS
+USE_GC_SECTIONS=yes
+endif
+
# If the user doesn't want gettext, undefine it.
ifeq (no, $(GETTEXT))
GETTEXT=
@@ -1093,6 +1098,16 @@
LIB += -Wl,-Bstatic -lwinpthread -Wl,-Bdynamic
endif
+# To reduce the file size
+ifeq (yes, $(USE_GC_SECTIONS))
+CFLAGS += -ffunction-sections -fno-asynchronous-unwind-tables
+CXXFLAGS += -fasynchronous-unwind-tables
+LFLAGS += -Wl,--gc-sections
+ ifeq (yes, $(VIMDLL))
+EXELFLAGS += -Wl,--gc-sections
+ endif
+endif
+
ifeq (yes, $(MAP))
LFLAGS += -Wl,-Map=$(TARGET).map
endif
diff --git a/src/version.c b/src/version.c
index a70a978..01aea1f 100644
--- a/src/version.c
+++ b/src/version.c
@@ -705,6 +705,8 @@
static int included_patches[] =
{ /* Add new patch number below this line */
/**/
+ 622,
+/**/
621,
/**/
620,