# $NetBSD: compiler.mk,v 1.91 2019/02/22 00:06:46 rillig Exp $
#
# This Makefile fragment implements handling for supported C/C++/Fortran
# compilers.
#
# The following variables may be set by the pkgsrc user in mk.conf:
#
# PKGSRC_COMPILER
#	A list of values specifying the chain of compilers to be used by
#	pkgsrc to build packages.
#
#	Valid values are:
#		ccc		Compaq C Compilers (Tru64)
#		ccache		compiler cache (chainable)
#		clang		Clang C and Objective-C compiler
#		distcc		distributed C/C++ (chainable)
#		f2c		Fortran 77 to C compiler (chainable)
#		icc		Intel C++ Compiler (Linux)
#		ido		SGI IRIS Development Option cc (IRIX 5)
#		gcc		GNU
#		hp		HP-UX C/aC++ compilers
#		mipspro		Silicon Graphics, Inc. MIPSpro (n32/n64)
#		mipspro-ucode	Silicon Graphics, Inc. MIPSpro (o32)
#		pcc		Portable C Compiler
#		sunpro		Sun Microsystems, Inc. WorkShip/Forte/Sun
#				ONE Studio
#		xlc		IBM's XL C/C++ compiler suite (Darwin/MacOSX)
#
#	The default is "gcc".  You can use ccache and/or distcc with
#	an appropriate PKGSRC_COMPILER setting, e.g. "ccache distcc
#	gcc".  You can also use "f2c" to overlay the lang/f2c package
#	over the C compiler instead of using the system Fortran
#	compiler.  The chain should always end in a real compiler.
#	This should only be set in /etc/mk.conf.
#
# COMPILER_USE_SYMLINKS
#	If set to yes, use symlinks for the compiler drivers, otherwise
#	shell scripts are created.  The default is yes.
#
# The following variables may be set by a package:
#
# USE_LANGUAGES
#	Declares the languages used in the source code of the package.
#	This is used to determine the correct compilers to make
#	visible to the build environment, installing them if
#	necessary.  Flags such as --std=c++99 are also added.
#	Valid values are: c, c99, c++, c++03, gnu++03, c++0x, gnu++0x,
#	c++11, gnu++11, c++14, gnu++14, fortran, fortran77, java, objc,
#	obj-c++, and ada.  The default is "c".
#
#       The above is partly aspirational.  As an example c++11 does
#       not force a new enough version of gcc.
#
# The following variables are defined, and available for testing in
# package Makefiles:
#
# CC_VERSION
#	The compiler and version being used, e.g.,
#
#	.include "../../mk/compiler.mk"
#
#	.if !empty(CC_VERSION:Mgcc-3*)
#	...
#	.endif
#
# Keywords: compiler

.if !defined(BSD_COMPILER_MK)
BSD_COMPILER_MK=	defined

_VARGROUPS+=		compiler
_USER_VARS.compiler=	PKGSRC_COMPILER USE_PKGSRC_GCC ABI COMPILER_USE_SYMLINKS
_PKG_VARS.compiler=	USE_LANGUAGES GCC_REQD NOT_FOR_COMPILER ONLY_FOR_COMPILER
_SYS_VARS.compiler=	CC_VERSION

.include "bsd.fast.prefs.mk"

# Since most packages need a C compiler, this is the default value.
USE_LANGUAGES?=	c

# Add c support if c99 is set
.if !empty(USE_LANGUAGES:Mc99)
USE_LANGUAGES+=	c
.endif

.for _version_ in gnu++14 c++14 gnu++11 c++11 gnu++0x c++0x gnu++03 c++03
.  if !empty(USE_LANGUAGES:M${_version_})
USE_LANGUAGES+=		c++
.  endif
.endfor

COMPILER_USE_SYMLINKS?=	yes

_COMPILERS=		ccc clang gcc hp icc ido \
			mipspro mipspro-ucode pcc sunpro xlc
_PSEUDO_COMPILERS=	ccache distcc f2c g95

.if defined(NOT_FOR_COMPILER) && !empty(NOT_FOR_COMPILER)
.  for _compiler_ in ${_COMPILERS}
.    if ${NOT_FOR_COMPILER:M${_compiler_}} == ""
_ACCEPTABLE_COMPILERS+=	${_compiler_}
.    endif
.  endfor
.elif defined(ONLY_FOR_COMPILER) && !empty(ONLY_FOR_COMPILER)
.  for _compiler_ in ${_COMPILERS}
.    if ${ONLY_FOR_COMPILER:M${_compiler_}} != ""
_ACCEPTABLE_COMPILERS+=	${_compiler_}
.    endif
.  endfor
.else
_ACCEPTABLE_COMPILERS+=	${_COMPILERS}
.endif

# Currently only gcc-based compilers support Ada
# Override PKGSRC_COMPILER if Ada language specified
.if !empty(USE_LANGUAGES:Mada)
PKGSRC_COMPILER=	gcc
.endif

.if defined(_ACCEPTABLE_COMPILERS)
.  for _acceptable_ in ${_ACCEPTABLE_COMPILERS}
.    for _compiler_ in ${PKGSRC_COMPILER}
.      if !empty(_ACCEPTABLE_COMPILERS:M${_compiler_}) && !defined(_COMPILER)
_COMPILER=	${_compiler_}
.      endif
.    endfor
.  endfor
.endif

.if !defined(_COMPILER)
PKG_FAIL_REASON+=	"No acceptable compiler found for ${PKGNAME}."
.endif

.for _compiler_ in ${PKGSRC_COMPILER}
.  if !empty(_PSEUDO_COMPILERS:M${_compiler_})
_PKGSRC_COMPILER:=	${_compiler_} ${_PKGSRC_COMPILER}
.  endif
.endfor
_PKGSRC_COMPILER:=	${_COMPILER} ${_PKGSRC_COMPILER}

_COMPILER_STRIP_VARS=	# empty

.for _compiler_ in ${_PKGSRC_COMPILER}
.  include "compiler/${_compiler_}.mk"
.endfor
.undef _compiler_

.if !defined(PKG_CPP)
PKG_CPP:=${CPP}
.endif

# Ensure the Solaris linker is used by default.
.if ${OPSYS} == "SunOS"
.  if exists(/usr/ccs/bin/ld)
PKG_LD?=       /usr/ccs/bin/ld
.  elif exists(/usr/bin/ld)
PKG_LD?=       /usr/bin/ld
.  endif
.endif

# Strip the leading paths from the toolchain variables since we manipulate
# the PATH to use the correct executable.
#
.for _var_ in ${_COMPILER_STRIP_VARS}
.  if empty(${_var_}:C/^/_asdf_/1:N_asdf_*)
${_var_}:=	${${_var_}:C/^/_asdf_/1:M_asdf_*:S/^_asdf_//:T}
.  else
${_var_}:=	${${_var_}:C/^/_asdf_/1:M_asdf_*:S/^_asdf_//:T} ${${_var_}:C/^/_asdf_/1:N_asdf_*}
.  endif
.endfor

# Pass the compiler flag based on the most recent version of the C++ standard
# required.  We currently assume that each standard is a superset of all that
# come after it.
#
# If and when the flags differ between compilers we can push this down into
# the respective mk/compiler/*.mk files.
#
_CXX_VERSION_REQD=
.for _version_ in gnu++14 c++14 gnu++11 c++11 gnu++0x c++0x gnu++03 c++03
.  if empty(_CXX_VERSION_REQD) && !empty(USE_LANGUAGES:M${_version_})
_CXX_VERSION_REQD=	${_version_}
_WRAP_EXTRA_ARGS.CXX+=	-std=${_CXX_VERSION_REQD}
CWRAPPERS_PREPEND.cxx+=	-std=${_CXX_VERSION_REQD}
.  endif
.endfor

.if defined(ABI) && !empty(ABI)
_WRAP_EXTRA_ARGS.CC+=	${_COMPILER_ABI_FLAG.${ABI}}
_WRAP_EXTRA_ARGS.CXX+=	${_COMPILER_ABI_FLAG.${ABI}}
_WRAP_EXTRA_ARGS.FC+=	${_COMPILER_ABI_FLAG.${ABI}}
CWRAPPERS_PREPEND.cc+=	${_COMPILER_ABI_FLAG.${ABI}}
CWRAPPERS_PREPEND.cxx+=	${_COMPILER_ABI_FLAG.${ABI}}
CWRAPPERS_PREPEND.f77+=	${_COMPILER_ABI_FLAG.${ABI}}
.endif

# Enable SSP if the user has chosen to and the compiler supports it.
#
.if ${_PKGSRC_USE_SSP} == "yes" && defined(_SSP_CFLAGS)
_WRAP_EXTRA_ARGS.CC+=	${_SSP_CFLAGS}
_WRAP_EXTRA_ARGS.CXX+=	${_SSP_CFLAGS}
CWRAPPERS_APPEND.cc+=	${_SSP_CFLAGS}
CWRAPPERS_APPEND.cxx+=	${_SSP_CFLAGS}
CWRAPPERS_APPEND.f77+=	${_SSP_CFLAGS}
.endif

# Add debug flags if the user has requested CTF and the compiler supports it.
#
.if ${_PKGSRC_USE_CTF} == "yes" && defined(_CTF_CFLAGS)
_WRAP_EXTRA_ARGS.CC+=	${_CTF_CFLAGS}
CWRAPPERS_APPEND.cc+=	${_CTF_CFLAGS}
.endif

# If the languages are not requested, force them not to be available
# in the generated wrappers.
#
_FAIL_WRAPPER.CC=	${WRKDIR}/.compiler/bin/c-fail-wrapper
_FAIL_WRAPPER.CXX=	${WRKDIR}/.compiler/bin/c++-fail-wrapper
_FAIL_WRAPPER.FC=	${WRKDIR}/.compiler/bin/fortran-fail-wrapper
_FAIL_WRAPPER.ADA=	${WRKDIR}/.compiler/bin/ada-fail-wrapper

${_FAIL_WRAPPER.CC}: fail-wrapper
${_FAIL_WRAPPER.CXX}: fail-wrapper
${_FAIL_WRAPPER.FC}: fail-wrapper
${_FAIL_WRAPPER.ADA}: fail-wrapper

.PHONY: fail-wrapper
fail-wrapper: .USE
	${RUN}${MKDIR} ${.TARGET:H}
	${RUN}					\
	exec 1>${.TARGET};						\
	${ECHO} '#!'${TOOLS_SHELL:Q};					\
	${ECHO} 'wrapperlog="$${TOOLS_WRAPPER_LOG-'${_TOOLS_WRAP_LOG:Q}'}"'; \
	${ECHO} 'lang="${.TARGET:T:S/-fail-wrapper//}"'; \
	${ECHO} 'msg="*** Please consider adding $$lang to USE_LANGUAGES in the package Makefile."'; \
	${ECHO} '${ECHO} "$$msg" >> $$wrapperlog'; \
	${ECHO} '${ECHO} "$$msg" > ${WARNING_DIR}/${.TARGET:T}'; \
	${ECHO} '${ECHO} "PKGSRC-WARNING: Something is trying to run the $$lang compiler," 1>&2'; \
	${ECHO} '${ECHO} "PKGSRC-WARNING: but it is not added to USE_LANGUAGES in the package Makefile." 1>&2'; \
	${ECHO} 'exit 1'
	${RUN}${CHMOD} +x ${.TARGET}

.if empty(USE_LANGUAGES:Mc) && empty(USE_LANGUAGES:Mobjc) && empty(USE_LANGUAGES:Mobjc-c++)
PKG_CC:=		${_FAIL_WRAPPER.CC}
ALL_ENV+=		CPP=${CPP:Q}
override-tools: ${_FAIL_WRAPPER.CC}
.endif
.if empty(USE_LANGUAGES:Mc++)
PKG_CXX:=		${_FAIL_WRAPPER.CXX}
ALL_ENV+=		CXXCPP=${CPP:Q} # to make some Autoconf scripts happy
override-tools: ${_FAIL_WRAPPER.CXX}
.endif
.if empty(USE_LANGUAGES:Mfortran) && empty(USE_LANGUAGES:Mfortran77)
PKG_FC:=		${_FAIL_WRAPPER.FC}
override-tools: ${_FAIL_WRAPPER.FC}
.endif
.if empty(USE_LANGUAGES:Mada)
PKG_ADA:=		${_FAIL_WRAPPER.ADA}
override-tools: ${_FAIL_WRAPPER.ADA}
.endif

.if !empty(DRAGONFLY_CCVER) && ${OPSYS} == "DragonFly"
ALL_ENV+=		CCVER=${DRAGONFLY_CCVER}
.endif

.endif	# BSD_COMPILER_MK