172 lines
6.4 KiB
Makefile
172 lines
6.4 KiB
Makefile
# Copyright 2023-2024 Free Software Foundation, Inc.
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# This file is part of GNU Emacs.
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# GNU Emacs is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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# GNU Emacs is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License
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# along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
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# ndk-build works by including a bunch of Makefiles which set
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# variables, and then having those Makefiles include another makefile
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# which actually builds targets.
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eq = $(and $(findstring $(1),$(2)),$(findstring $(2),$(1)))
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# Objects for shared libraries are prefixed with `-shared-' in
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# addition to the name of the module, because a common practice in
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# Android.mk files written by Google is to define two modules with the
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# same name but of different types.
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objname = $(1)-shared-$(subst /,_,$(2).o)
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# LOCAL_SRC_FILES sometimes contains absolute file names. Filter them
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# out with this function. If $(2), this is a file relative to the
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# build directory.
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maybe-absolute = $(or $(and $(2),$(1)),$(and $(wildcard $(1)),$(1)),$(LOCAL_PATH)/$(1))
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# Here are the default flags to link shared libraries with.
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NDK_SO_DEFAULT_LDFLAGS := -lc -lm
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define single-object-target
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ifeq (x$(suffix $(1)),x.c)
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$(call objname,$(LOCAL_MODULE),$(basename $(1))): $(call maybe-absolute,$(1),$(2))
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$(NDK_BUILD_CC) -c $$< -o $$@ $(NDK_CFLAGS_$(LOCAL_MODULE)) $(NDK_BUILD_CFLAGS) $(call LOCAL_C_ADDITIONAL_FLAGS,$(1))
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else
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ifeq (x$(suffix $(1)),x.$(or $(LOCAL_CPP_EXTENSION),cpp))
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$(call objname,$(LOCAL_MODULE),$(basename $(1))): $(call maybe-absolute,$(1))
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$(NDK_BUILD_CXX) -c $$< -o $$@ $(NDK_CFLAGS_$(LOCAL_MODULE)) $(NDK_BUILD_CFLAGS_CXX) $(NDK_CXXFLAGS_$(LOCAL_MODULE))
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else
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ifneq ($(or $(call eq,x$(suffix $(1)),x.s),$(call eq,x$(suffix $(1)),x.S)),)
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$(call objname,$(LOCAL_MODULE),$(basename $(1))): $(call maybe-absolute,$(1),$(2))
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$(NDK_BUILD_CC) -c $$< -o $$@ $(NDK_ASFLAGS_$(LOCAL_MODULE))
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else
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ifneq (x$(suffix $(1)),x.asm)
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ifeq (x$(suffix $(1)),x.cc)
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$(call objname,$(LOCAL_MODULE),$(basename $(1))): $(call maybe-absolute,$(1),$(2))
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$(NDK_BUILD_CXX) -c $$< -o $$@ $(NDK_CFLAGS_$(LOCAL_MODULE)) $(NDK_BUILD_CFLAGS_CXX) $(NDK_CXXFLAGS_$(LOCAL_MODULE))
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else
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$$(error Unsupported suffix: $(suffix $(1)))
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endif
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else
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ifneq (x$(LOCAL_ASM_RULE_DEFINED),x)
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# Call this function to define a rule that will generate $(1) from
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# $(2), a ``.asm'' file. This is an Emacs extension.
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$(call LOCAL_ASM_RULE,$(call objname,$(LOCAL_MODULE),$(basename $(1))),$(LOCAL_PATH)/$(strip $(1)))
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else
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ifeq ($(findstring x86,$(NDK_BUILD_ARCH)),)
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$$(error Trying to build nasm file on non-Intel platform!)
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else
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$(call objname,$(LOCAL_MODULE),$(basename $(1))): $(LOCAL_PATH)/$(1)
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$(NDK_BUILD_NASM) -felf$(findstring 64,$(NDK_BUILD_ARCH)) -o $$@ -i $(LOCAL_PATH) -i $$(dir $$<) $(NDK_ASFLAGS_$(LOCAL_MODULE)) $$<
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endif
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endif
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endif
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endif
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endif
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endif
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ALL_OBJECT_FILES$(LOCAL_MODULE) += $(call objname,$(LOCAL_MODULE),$(basename $(1)))
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endef
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define single-neon-target
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# Define rules for the target.
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$$(eval $$(call single-object-target,$(patsubst %.neon,%,$(1)),))
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endef
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# Make sure to not add a prefix to local includes that already specify
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# $(LOCAL_PATH).
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NDK_CFLAGS_$(LOCAL_MODULE) := $(addprefix -I,$(LOCAL_C_INCLUDES))
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NDK_CFLAGS_$(LOCAL_MODULE) += -fPIC -iquote $(LOCAL_PATH) $(LOCAL_EXPORT_CFLAGS) $(LOCAL_CFLAGS) $(LOCAL_CFLAGS_$(NDK_BUILD_ARCH))
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NDK_ASFLAGS_$(LOCAL_MODULE) := $(LOCAL_ASFLAGS) $(LOCAL_ASFLAGS_$(NDK_BUILD_ARCH)) $(and $(findstring clang,$(NDK_BUILD_CC)),$(LOCAL_CLANG_ASFLAGS_$(NDK_BUILD_ARCH)))
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NDK_LDFLAGS_$(LOCAL_MODULE) := $(LOCAL_LDLIBS) $(LOCAL_LDFLAGS)
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NDK_CXXFLAGS_$(LOCAL_MODULE) := $(LOCAL_CPPFLAGS) $(LOCAL_RTTI_FLAG)
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# Now look for features in LOCAL_CPP_FEATURES and enable them.
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ifneq ($(findstring exceptions,$(LOCAL_CPPFLAGS)),)
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NDK_CXXFLAGS_$(LOCAL_MODULE) += -fexceptions
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endif
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ifneq ($(findstring rtti,$(LOCAL_CPPFLAGS)),)
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NDK_CXXFLAGS_$(LOCAL_MODULE) += -frtti
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endif
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ALL_OBJECT_FILES$(LOCAL_MODULE) :=
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ifeq ($(NDK_BUILD_ARCH)$(NDK_ARM_MODE),armarm)
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NDK_CFLAGS ::= -marm
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else
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ifeq ($(NDK_BUILD_ARCH),arm)
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NDK_CFLAGS ::= -mthumb
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endif
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endif
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ifeq ($(filter-out lib%,$(LOCAL_MODULE)),)
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LOCAL_MODULE_FILENAME := $(LOCAL_MODULE)_emacs
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else
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LOCAL_MODULE_FILENAME := lib$(LOCAL_MODULE)_emacs
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endif
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# Since a shared library is being built, suffix the library with
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# _emacs. Otherwise, libraries already on the system will be found
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# first, with potentially nasty consequences.
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LOCAL_MODULE_FILENAME := $(LOCAL_MODULE_FILENAME).so
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# Record this module's dependencies and exported includes and CFLAGS,
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# and then add that of its dependencies.
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include $(srcdir)/ndk-resolve.mk
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# Then define rules to build all objects.
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ALL_SOURCE_FILES := $(LOCAL_SRC_FILES) $(LOCAL_SRC_FILES_$(NDK_BUILD_ARCH))
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# This defines all dependencies.
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ALL_OBJECT_FILES$(LOCAL_MODULE) :=
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# Now filter out code that is built with neon. Define rules to build
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# those separately.
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NEON_SOURCE_FILES := $(filter %.neon,$(ALL_SOURCE_FILES))
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ALL_SOURCE_FILES := $(filter-out %.neon,$(ALL_SOURCE_FILES))
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$(foreach source,$(ALL_SOURCE_FILES),$(eval $(call single-object-target,$(source),)))
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$(foreach source,$(NEON_SOURCE_FILES),$(eval $(call single-neon-target,$(source))))
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# Now define the rule to build the shared library. Shared libraries
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# link with all of the archive files from the static libraries on
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# which they depend, and also any shared libraries they depend on.
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define define-module-rule
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$(LOCAL_MODULE_FILENAME): $(ALL_OBJECT_FILES$(LOCAL_MODULE)) $(NDK_LOCAL_A_NAMES_$(LOCAL_MODULE)) $(NDK_WHOLE_A_NAMES_$(LOCAL_MODULE)) $(NDK_LOCAL_SO_NAMES_$(LOCAL_MODULE))
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$(NDK_BUILD_CC) $(1) $(2) -o $$@ -shared $(NDK_LDFLAGS_$(LOCAL_MODULE)) $(NDK_SO_EXTRA_FLAGS_$(LOCAL_MODULE)) $(NDK_SO_DEFAULT_LDFLAGS) $(foreach so,$(NDK_LOCAL_SO_NAMES_$(LOCAL_MODULE)),-L $(abspath $(CURDIR)) -l:$(so))
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endef
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NDK_WHOLE_ARCHIVE_PREFIX = -Wl,--whole-archive
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NDK_WHOLE_ARCHIVE_SUFFIX = -Wl,--no-whole-archive
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$(eval $(call define-module-rule,$(ALL_OBJECT_FILES$(LOCAL_MODULE)) $(NDK_LOCAL_A_NAMES_$(LOCAL_MODULE)),$(and $(strip $(NDK_WHOLE_A_NAMES_$(LOCAL_MODULE))),$(NDK_WHOLE_ARCHIVE_PREFIX) $(NDK_WHOLE_A_NAMES_$(LOCAL_MODULE)) $(NDK_WHOLE_ARCHIVE_SUFFIX))))
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