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makefile: auto-detect presence of various Lua, bsd

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We favor LuaJIT over Lua. We disable Lua if neither can be found. We
error out if a particular Lua is specified via LUA_IMPLEMENTATION=JIT or
LUA_IMPLEMENTATION=VANILLA, but cannot be found. We print a status
message depending on what happens.

Also, we do not link against libdl on the BSDs, since they include it as
part of libc.

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
This commit is contained in:
Jason A. Donenfeld 2014-01-14 01:50:31 +01:00
parent d3c0370a3f
commit 3488d12405
1 changed files with 37 additions and 10 deletions
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45
cgit.mk
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@ -25,23 +25,50 @@ ifdef NO_C99_FORMAT
CFLAGS += -DNO_C99_FORMAT
endif
nullstring :=
fourspace := $(nullstring)
ifdef NO_LUA
CFLAGS += -DNO_LUA
$(info $(fourspace)* building without specified Lua support)
CGIT_CFLAGS += -DNO_LUA
else
ifeq (VANILLA,$(LUA_IMPLEMENTATION))
CFLAGS += -llua
else
LUAJIT_LIBS := $(shell pkg-config --libs luajit)
LUAJIT_CFLAGS := $(shell pkg-config --cflags luajit)
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
$(info $(fourspace)* building with selected LuaJIT)
CGIT_LIBS += $(LUAJIT_LIBS)
CFLAGS += $(LUAJIT_CFLAGS)
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
$(info $(fourspace)* building with selected Lua)
CGIT_LIBS += $(LUA_LIBS)
CGIT_LIBS += $(LUA_CFLAGS)
else ifneq ($(strip $(LUAJIT_LIBS)),)
$(info $(fourspace)* building with autodetected LuaJIT)
CGIT_LIBS += $(LUAJIT_LIBS)
CGIT_CFLAGS += $(LUAJIT_CFLAGS)
else ifneq ($(strip $(LUA_LIBS)),)
$(info $(fourspace)* building with autodetected Lua)
CGIT_LIBS += $(LUA_LIBS)
CGIT_CFLAGS += $(LUA_CFLAGS)
else
$(info $(fourspace)* building without autodetected Lua support)
NO_LUA := YesPlease
CGIT_CFLAGS += -DNO_LUA
endif
endif
# Add -ldl to linker flags on non-BSD systems.
ifeq ($(findstring BSD,$(uname_S)),)
CGIT_LIBS += -ldl
endif
CGIT_OBJ_NAMES += cgit.o