cache: use sendfile() instead of a pair of read() + write()

[ps-cgit] / cgit.mk

diff --git a/cgit.mk b/cgit.mk
index 9d6dea8c368371e8e5b3f716c29665a98f7f8d73..3b8b79acc7607b9452b7776f348b8d11e3c33a73 100644 (file)
--- a/cgit.mk
+++ b/cgit.mk
@@ -25,6 +25,58 @@ ifdef NO_C99_FORMAT
        CFLAGS += -DNO_C99_FORMAT
 endif
 
+ifdef NO_LUA
+       LUA_MESSAGE := linking without specified Lua support
+       CGIT_CFLAGS += -DNO_LUA
+else
+LUAJIT_CFLAGS := $(shell pkg-config --cflags luajit 2>/dev/null)
+LUAJIT_LIBS := $(shell pkg-config --libs luajit 2>/dev/null)
+LUA_LIBS := $(shell pkg-config --libs lua 2>/dev/null)
+LUA_CFLAGS := $(shell pkg-config --cflags lua 2>/dev/null)
+ifeq (JIT,$(LUA_IMPLEMENTATION))
+       ifeq ($(strip $(LUAJIT_LIBS)),)
+               $(error LuaJIT specified via LUA_IMPLEMENTATION=JIT, but library could not be found.)
+       endif
+       LUA_MESSAGE := linking with selected LuaJIT
+       CGIT_LIBS += $(LUAJIT_LIBS)
+       CGIT_CFLAGS += $(LUAJIT_CFLAGS)
+else ifeq (VANILLA,$(LUA_IMPLEMENTATION))
+       ifeq ($(strip $(LUA_LIBS)),)
+               $(error Lua specified via LUA_IMPLEMENTATION=VANILLA, but library could not be found.)
+       endif
+       LUA_MESSAGE := linking with selected Lua
+       CGIT_LIBS += $(LUA_LIBS)
+       CGIT_LIBS += $(LUA_CFLAGS)
+else ifneq ($(strip $(LUAJIT_LIBS)),)
+       LUA_MESSAGE := linking with autodetected LuaJIT
+       CGIT_LIBS += $(LUAJIT_LIBS)
+       CGIT_CFLAGS += $(LUAJIT_CFLAGS)
+else ifneq ($(strip $(LUA_LIBS)),)
+       LUA_MESSAGE := linking with autodetected Lua
+       CGIT_LIBS += $(LUA_LIBS)
+       CGIT_CFLAGS += $(LUA_CFLAGS)
+else
+       LUA_MESSAGE := linking without autodetected Lua support
+       NO_LUA := YesPlease
+       CGIT_CFLAGS += -DNO_LUA
+endif
+
+endif
+
+# Add -ldl to linker flags on non-BSD systems.
+ifeq ($(findstring BSD,$(uname_S)),)
+       CGIT_LIBS += -ldl
+endif
+
+# glibc 2.1+ offers sendfile which the most common C library on Linux
+ifeq ($(uname_S),Linux)
+       HAVE_LINUX_SENDFILE = YesPlease
+endif
+
+ifdef HAVE_LINUX_SENDFILE
+       CGIT_CFLAGS += -DHAVE_LINUX_SENDFILE
+endif
+
 CGIT_OBJ_NAMES += cgit.o
 CGIT_OBJ_NAMES += cache.o
 CGIT_OBJ_NAMES += cmd.o
@@ -61,9 +113,6 @@ $(CGIT_VERSION_OBJS): $(CGIT_PREFIX)VERSION
 $(CGIT_VERSION_OBJS): EXTRA_CPPFLAGS = \
        -DCGIT_VERSION='"$(CGIT_VERSION)"'
 
-CGIT_LIBS += -ldl
-
-
 # Git handles dependencies using ":=" so dependencies in CGIT_OBJ are not
 # handled by that and we must handle them ourselves.
 cgit_dep_files := $(foreach f,$(CGIT_OBJS),$(dir $f).depend/$(notdir $f).d)
@@ -90,4 +139,5 @@ $(CGIT_OBJS): %.o: %.c GIT-CFLAGS $(CGIT_PREFIX)CGIT-CFLAGS $(missing_dep_dirs)
        $(QUIET_CC)$(CC) -o $*.o -c $(dep_args) $(ALL_CFLAGS) $(EXTRA_CPPFLAGS) $(CGIT_CFLAGS) $<
 
 $(CGIT_PREFIX)cgit: $(CGIT_OBJS) GIT-LDFLAGS $(GITLIBS)
+       @echo 1>&1 "    * $(LUA_MESSAGE)"
        $(QUIET_LINK)$(CC) $(ALL_CFLAGS) -o $@ $(ALL_LDFLAGS) $(filter %.o,$^) $(LIBS) $(CGIT_LIBS)