waifulib: xcompile: merge xcompile from engine branch

scripts/waifulib/xcompile.py

@@ -19,13 +19,21 @@ from collections import OrderedDict
 import os
 import sys
 
+ANDROID_NDK_ENVVARS = ['ANDROID_NDK_HOME', 'ANDROID_NDK']
+ANDROID_NDK_SUPPORTED = [10, 19, 20]
+ANDROID_NDK_HARDFP_MAX = 11 # latest version that supports hardfp
+ANDROID_NDK_GCC_MAX = 17 # latest NDK that ships with GCC
+ANDROID_NDK_UNIFIED_SYSROOT_MIN = 15
+ANDROID_NDK_SYSROOT_FLAG_MAX = 19 # latest NDK that need --sysroot flag
+ANDROID_NDK_API_MIN = { 10: 3, 19: 16, 20: 16 } # minimal API level ndk revision supports
+ANDROID_64BIT_API_MIN = 21 # minimal API level that supports 64-bit targets
+
 # This class does support ONLY r10e and r19c/r20 NDK
 class Android:
 	ctx            = None # waf context
 	arch           = None
 	toolchain      = None
 	api            = None
-	toolchain_path = None
 	ndk_home       = None
 	ndk_rev        = 0
 	is_hardfloat   = False
@@ -37,13 +45,13 @@ class Android:
 		self.toolchain = toolchain
 		self.arch = arch
 
-		for i in ['ANDROID_NDK_HOME', 'ANDROID_NDK']:
+		for i in ANDROID_NDK_ENVVARS:
 			self.ndk_home = os.getenv(i)
 			if self.ndk_home != None:
 				break
-
-		if not self.ndk_home:
-			ctx.fatal('Set ANDROID_NDK_HOME environment variable pointing to the root of Android NDK!')
+		else:
+			ctx.fatal('Set %s environment variable pointing to the root of Android NDK!' %
+				' or '.join(ANDROID_NDK_ENVVARS))
 
 		# TODO: this were added at some point of NDK development
 		# but I don't know at which version
@@ -57,32 +65,29 @@ class Android:
 
 					if 'Pkg.Revision' in trimed_tokens:
 						self.ndk_rev = int(trimed_tokens[1].split('.')[0])
-		else:
-			self.ndk_rev = 10
 
-		if self.ndk_rev not in [10, 19, 20]:
-			ctx.fatal('Unknown NDK revision: %d' % (self.ndk_rev))
-
-		if self.is_host() and self.ndk_rev < 20:
-			ctx.fatal('Using host toolchain with this NDK revision is untested. You can comment this check, but you\'re on your own!')
+			if self.ndk_rev not in ANDROID_NDK_SUPPORTED:
+				ctx.fatal('Unknown NDK revision: %d' % (self.ndk_rev))
+		else:
+			self.ndk_rev = ANDROID_NDK_SUPPORTED[0]
 
-		if self.ndk_rev >= 19 or 'clang' in self.toolchain:
+		if 'clang' in self.toolchain or self.ndk_rev > ANDROID_NDK_GCC_MAX:
 			self.clang = True
 
 		if self.arch == 'armeabi-v7a-hard':
-			if self.ndk_rev <= 10:
+			if self.ndk_rev <= ANDROID_NDK_HARDFP_MAX:
 				self.arch = 'armeabi-v7a' # Only armeabi-v7a have hard float ABI
 				self.is_hardfloat = True
 			else:
 				ctx.fatal('NDK does not support hardfloat ABI')
 
-		if self.is_arm64() or self.is_amd64() and self.api < 21:
-			Logs.warn('API level for 64-bit target automatically was set to 21')
-			self.api = 21
-		elif self.ndk_rev >= 19 and self.api < 16:
-			Logs.warn('API level automatically was set to 16 due to NDK support')
-			self.api = 16
-		self.toolchain_path = self.gen_toolchain_path()
+		if self.api < ANDROID_NDK_API_MIN[self.ndk_rev]:
+			self.api = ANDROID_NDK_API_MIN[self.ndk_rev]
+			Logs.warn('API level automatically was set to %d due to NDK support' % self.api)
+
+		if self.is_arm64() or self.is_amd64() and self.api < ANDROID_64BIT_API_MIN:
+			self.api = ANDROID_64BIT_API_MIN
+			Logs.warn('API level for 64-bit target automatically was set to %d' % self.api)
 
 	def is_host(self):
 		'''
@@ -139,29 +144,32 @@ class Android:
 		else:
 			return self.arch + '-linux-android'
 
-	def gen_gcc_toolchain_path(self):
-		path = 'toolchains'
+	def gen_host_toolchain(self):
+		# With host toolchain we don't care about OS
+		# so just download NDK for Linux x86_64
+		if self.is_host():
+			return 'linux-x86_64'
 
 		if sys.platform.startswith('win32') or sys.platform.startswith('cygwin'):
-			toolchain_host = 'windows'
+			osname = 'windows'
 		elif sys.platform.startswith('darwin'):
-			toolchain_host = 'darwin'
-		elif sys.platform.startswith('linux') or self.is_host():
-			toolchain_host = 'linux'
+			osname = 'darwin'
+		elif sys.platform.startswith('linux'):
+			osname = 'linux'
 		else:
 			self.ctx.fatal('Unsupported by NDK host platform')
 
-		toolchain_host += '-'
-
-		# Assuming we are building on x86
 		if sys.maxsize > 2**32:
-			toolchain_host += 'x86_64'
-		else: toolchain_host += 'x86'
+			arch = 'x86_64'
+		else: arch = 'x86'
 
-		if self.is_clang():
-			if self.ndk_rev < 19:
-				raise self.ctx.fatal('Clang is not supported for this NDK')
+		return '%s-%s' % (osname, arch)
 
+	def gen_gcc_toolchain_path(self):
+		path = 'toolchains'
+		toolchain_host = self.gen_host_toolchain()
+
+		if self.is_clang():
 			toolchain_folder = 'llvm'
 		else:
 			if self.is_host():
@@ -186,12 +194,12 @@ class Android:
 	def cc(self):
 		if self.is_host():
 			return 'clang --target=%s%d' % (self.ndk_triplet(), self.api)
-		return self.toolchain_path + ('clang' if self.is_clang() else 'gcc')
+		return self.gen_toolchain_path() + ('clang' if self.is_clang() else 'gcc')
 
 	def cxx(self):
 		if self.is_host():
 			return 'clang++ --target=%s%d' % (self.ndk_triplet(), self.api)
-		return self.toolchain_path + ('clang++' if self.is_clang() else 'g++')
+		return self.gen_toolchain_path() + ('clang++' if self.is_clang() else 'g++')
 
 	def strip(self):
 		if self.is_host():
@@ -213,24 +221,28 @@ class Android:
 		return os.path.abspath(os.path.join(self.ndk_home, path))
 
 	def sysroot(self):
-		if self.ndk_rev >= 19:
+		if self.ndk_rev >= ANDROID_NDK_UNIFIED_SYSROOT_MIN:
 			return os.path.abspath(os.path.join(self.ndk_home, 'sysroot'))
 		else:
 			return self.libsysroot()
 
-	def cflags(self):
+	def cflags(self, cxx = False):
 		cflags = []
-		if self.is_host():
-			if self.ndk_rev >= 19:
+
+		if self.ndk_rev <= ANDROID_NDK_SYSROOT_FLAG_MAX:
+			cflags += ['--sysroot=%s' % (self.sysroot())]
+		else:
+			if self.is_host():
 				cflags += [
 					'--sysroot=%s/sysroot' % (self.gen_gcc_toolchain_path()),
 					'-I%s/usr/include/' % (self.sysroot())
 				]
-			else: cflags += ['--sysroot=%s' % (self.sysroot())]
-		elif self.ndk_rev < 20:
-			cflags += ['--sysroot=%s' % (self.sysroot())]
 
 		cflags += ['-I%s' % (self.system_stl()), '-DANDROID', '-D__ANDROID__']
+
+		if cxx and not self.is_clang() and self.toolchain not in ['4.8','4.9']:
+			cflags += ['-fno-sized-deallocation']
+
 		if self.is_arm():
 			if self.arch == 'armeabi-v7a':
 				# ARMv7 support
@@ -239,8 +251,18 @@ class Android:
 				if not self.is_clang() and not self.is_host():
 					cflags += [ '-mvectorize-with-neon-quad' ]
 
-				if self.is_hardfloat:
-					cflags += ['-D_NDK_MATH_NO_SOFTFP=1', '-mhard-float', '-mfloat-abi=hard', '-DLOAD_HARDFP', '-DSOFTFP_LINK']
+				if self.is_hardfp():
+					cflags += ['-D_NDK_MATH_NO_SOFTFP=1', '-mfloat-abi=hard', '-DLOAD_HARDFP', '-DSOFTFP_LINK']
+
+					if self.is_host():
+					# Clang builtin redefine w/ different calling convention bug
+					# NOTE: I did not added complex.h functions here, despite
+					# that NDK devs forgot to put __NDK_FPABI_MATH__ for complex
+					# math functions
+					# I personally don't need complex numbers support, but if you want it
+					# just run sed to patch header
+						for f in ['strtod', 'strtof', 'strtold']:
+							cflags += ['-fno-builtin-%s' % f]
 				else:
 					cflags += ['-mfloat-abi=softfp']
 			else:
@@ -256,7 +278,7 @@ class Android:
 		if self.is_host():
 			linkflags += ['--gcc-toolchain=%s' % self.gen_gcc_toolchain_path()]
 
-		if self.ndk_rev < 20:
+		if self.ndk_rev <= ANDROID_NDK_SYSROOT_FLAG_MAX:
 			linkflags += ['--sysroot=%s' % (self.sysroot())]
 		elif self.is_host():
 			linkflags += ['--sysroot=%s/sysroot' % (self.gen_gcc_toolchain_path())]
@@ -264,17 +286,21 @@ class Android:
 		if self.is_clang() or self.is_host():
 			linkflags += ['-fuse-ld=lld']
 
-		linkflags += ['-Wl,--hash-style=both']
+		linkflags += ['-Wl,--hash-style=both','-Wl,--no-undefined']
 		return linkflags
 
 	def ldflags(self):
-		ldflags = ['-stdlib=libstdc++', '-lgcc', '-no-canonical-prefixes']
+		ldflags = ['-lgcc', '-no-canonical-prefixes']
+		if self.is_clang() or self.is_host():
+			ldflags += ['-stdlib=libstdc++']
 		if self.is_arm():
 			if self.arch == 'armeabi-v7a':
 				ldflags += ['-march=armv7-a', '-mthumb']
+
 				if not self.is_clang() and not self.is_host(): # lld only
 					ldflags += ['-Wl,--fix-cortex-a8']
-				if self.is_hardfloat:
+
+				if self.is_hardfp():
 					ldflags += ['-Wl,--no-warn-mismatch', '-lm_hard']
 			else:
 				ldflags += ['-march=armv5te']
@@ -301,7 +327,7 @@ def configure(conf):
 		conf.environ['CXX'] = android.cxx()
 		conf.environ['STRIP'] = android.strip()
 		conf.env.CFLAGS += android.cflags()
-		conf.env.CXXFLAGS += android.cflags()
+		conf.env.CXXFLAGS += android.cflags(True)
 		conf.env.LINKFLAGS += android.linkflags()
 		conf.env.LDFLAGS += android.ldflags()
 
@@ -314,9 +340,9 @@ def configure(conf):
 
 		conf.msg('Selected Android NDK', '%s, version: %d' % (android.ndk_home, android.ndk_rev))
 		# no need to print C/C++ compiler, as it would be printed by compiler_c/cxx
-		conf.msg('... C/C++ flags', ' '.join(android.cflags()).replace(android.ndk_home, '$NDK'))
-		conf.msg('... link flags', ' '.join(android.linkflags()).replace(android.ndk_home, '$NDK'))
-		conf.msg('... ld flags', ' '.join(android.ldflags()).replace(android.ndk_home, '$NDK'))
+		conf.msg('... C/C++ flags', ' '.join(android.cflags()).replace(android.ndk_home, '$NDK/'))
+		conf.msg('... link flags', ' '.join(android.linkflags()).replace(android.ndk_home, '$NDK/'))
+		conf.msg('... ld flags', ' '.join(android.ldflags()).replace(android.ndk_home, '$NDK/'))
 
 		# conf.env.ANDROID_OPTS = android
 		conf.env.DEST_OS2 = 'android'