SRCDIR := $(abspath $(dir $(lastword $(MAKEFILE_LIST))))
BUILDDIR := .
JULIAHOME := $(abspath $(SRCDIR)/..)
include $(JULIAHOME)/deps/Versions.make
include $(JULIAHOME)/Make.inc

TAGGED_RELEASE_BANNER := ""

ifneq ($(USEMSVC), 1)
CPP_STDOUT := $(CPP) -P
else
CPP_STDOUT := $(CPP) -E
endif

all: $(addprefix $(BUILDDIR)/,pcre_h.jl errno_h.jl build_h.jl.phony file_constants.jl uv_constants.jl version_git.jl.phony)

PCRE_CONST := 0x[0-9a-fA-F]+|[0-9]+
ifeq ($(USE_SYSTEM_PCRE), 1)
  PCRE_INCL_PATH := $(shell $(PCRE_CONFIG) --prefix)/include/pcre2.h
else
  PCRE_INCL_PATH := $(build_includedir)/pcre2.h
endif

$(BUILDDIR)/pcre_h.jl: $(PCRE_INCL_PATH)
	@$(call PRINT_PERL, $(CPP) -D PCRE2_CODE_UNIT_WIDTH=8 -dM $< | perl -nle '/^\s*#define\s+PCRE2_(\w*)\s*\(?($(PCRE_CONST))\)?u?\s*$$/ and print "const $$1 = UInt32($$2)"' | LC_ALL=C sort > $@)

$(BUILDDIR)/errno_h.jl:
	@$(call PRINT_PERL, echo '#include <errno.h>' | $(CPP) -dM - | perl -nle 'print "const $$1 = Int32($$2)" if /^#define\s+(E\w+)\s+(\d+)\s*$$/' | LC_ALL=C sort > $@)

$(BUILDDIR)/file_constants.jl: $(SRCDIR)/../src/file_constants.h
	@$(call PRINT_PERL, $(CPP_STDOUT) -DJULIA $< | perl -nle 'print "$$1 0o$$2" if /^(\s*const\s+[A-z_]+\s+=)\s+(0[0-9]*)\s*$$/; print "$$1" if /^\s*(const\s+[A-z_]+\s+=\s+([1-9]|0x)[0-9A-z]*)\s*$$/' > $@)

$(BUILDDIR)/uv_constants.jl: $(SRCDIR)/../src/uv_constants.h $(build_includedir)/uv/errno.h
	@$(call PRINT_PERL, $(CPP_STDOUT) "-I$(LIBUV_INC)" -DJULIA $< | tail -n 16 > $@)

$(BUILDDIR)/build_h.jl.phony:
	@echo "# This file is automatically generated in base/Makefile" > $@
ifeq ($(XC_HOST),)
	@echo "const MACHINE = \"$(BUILD_MACHINE)\"" >> $@
else
	@echo "const MACHINE = \"$(XC_HOST)\"" >> $@
endif
	@echo "const libm_name = \"$(LIBMNAME)\"" >> $@
	@echo "const libblas_name = \"$(LIBBLASNAME)\"" >> $@
	@echo "const liblapack_name = \"$(LIBLAPACKNAME)\"" >> $@
ifeq ($(USE_BLAS64), 1)
	@echo "const USE_BLAS64 = true" >> $@
else
	@echo "const USE_BLAS64 = false" >> $@
endif
ifeq ($(USE_GPL_LIBS), 1)
	@echo "const USE_GPL_LIBS = true" >> $@
else
	@echo "const USE_GPL_LIBS = false" >> $@
endif
	@echo "const libllvm_version_string = \"$$($(LLVM_CONFIG_HOST) --version)\"" >> $@
	@echo "const VERSION_STRING = \"$(JULIA_VERSION)\"" >> $@
	@echo "const TAGGED_RELEASE_BANNER = \"$(TAGGED_RELEASE_BANNER)\"" >> $@
ifeq ($(OS),WINNT)
	@printf 'const SYSCONFDIR = "%s"\n' '$(subst /,\\,$(sysconfdir_rel))' >> $@
	@printf 'const DATAROOTDIR = "%s"\n' '$(subst /,\\,$(datarootdir_rel))' >> $@
	@printf 'const DOCDIR = "%s"\n' '$(subst /,\\,$(docdir_rel))' >> $@
	@printf 'const LIBDIR = "%s"\n' '$(subst /,\\,$(libdir_rel))' >> $@
	@printf 'const PRIVATE_LIBDIR = "%s"\n' '$(subst /,\\,$(private_libdir_rel))' >> $@
	@printf 'const INCLUDEDIR = "%s"\n' '$(subst /,\\,$(includedir_rel))' >> $@
else
	@echo "const SYSCONFDIR = \"$(sysconfdir_rel)\"" >> $@
	@echo "const DATAROOTDIR = \"$(datarootdir_rel)\"" >> $@
	@echo "const DOCDIR = \"$(docdir_rel)\"" >> $@
	@echo "const LIBDIR = \"$(libdir_rel)\"" >> $@
	@echo "const PRIVATE_LIBDIR = \"$(private_libdir_rel)\"" >> $@
	@echo "const INCLUDEDIR = \"$(includedir_rel)\"" >> $@
endif

	@# This to ensure that we always rebuild this file, but only when it is modified do we touch build_h.jl,
	@# ensuring we rebuild the system image as infrequently as possible
	@if ! cmp -s $@ build_h.jl; then \
		$(call PRINT_PERL,) \
		mv $@ build_h.jl; \
	else \
		rm -f $@; \
	fi

$(BUILDDIR)/version_git.jl.phony: $(SRCDIR)/version_git.sh
ifneq ($(NO_GIT), 1)
	sh $< $(SRCDIR) > $@
	@# This to avoid touching git_version.jl when it is not modified,
	@# so that the system image does not need to be rebuilt.
	@if ! cmp -s $@ version_git.jl; then \
	    $(call PRINT_PERL,) \
	    mv $@ version_git.jl; \
	else \
	    rm -f $@; \
	fi
else
ifeq ($(shell [ -f $(BUILDDIR)/version_git.jl ] && echo "true"), true)
	@# Give warning if boilerplate git is used
	@if grep -q "Default output if git is not available" $(BUILDDIR)/version_git.jl; then \
	    echo "WARNING: Using boilerplate git version info" >&2; \
	fi
else
	$(warning "WARNING: Generating boilerplate git version info")
	@sh $(SRCDIR)/version_git.sh $(SRCDIR) NO_GIT > $(BUILDDIR)/version_git.jl
endif
endif

ifneq ($(OS), WINNT)
# For any USE_SYSTEM_* libraries that will be dynamically loaded by libjulia,
# put a symlink in the private libdir.
# System package managers may want to install these links manually,
# but if not, this will try to create the proper symlink to the right minor version.
all: symlink_system_libraries
SYMLINK_SYSTEM_LIBRARIES :=

# if it's a symlink, pick up the symlink target instead, for one level of indirection
resolve_path = \
	$1_wd="`pwd`" && \
	$1_=`readlink -n $${$1} || true` && \
	if [ -n "$${$1_}" ]; then $1_wd=`dirname "$${$1}"`; $1="$${$1_}"; fi
## if it's a relative path, make it an absolute path
resolve_path += && \
	if [ -z "`echo $${$1} | grep '^/'`" ]; then $1=$${$1_wd}/$${$1}; fi
ifeq ($(OS), Darwin)
# try to use the install_name id instead (unless it is an @rpath or such)
# if it's a relative path, make it an absolute path using the working directory from $1,
# while in theory incorrect, this has been observed to be a common build mistake for many libraries
resolve_path += && \
	$1_=`otool -D $${$1} | tail -n +2 | sed -e 's/^@.*$$//'` && \
	if [ -n "$${$1_}" ]; then \
	$1_wd=`dirname "$${$1}"`; $1=$${$1_}; \
	if [ -z "`echo $${$1} | grep '^/'`" ]; then $1=$${$1_wd}/$${$1}; fi; \
	fi
else
# try to use the SO_NAME (if the named file exists)
resolve_path += && \
	$1_=`objdump -p "$${$1}" | awk '/SONAME/ {print $$2}'` && \
	if [ -n "$${$1_}" ]; then \
	$1_=$$(dirname "$${$1}")/$${$1_}; \
	if [ -e "$${$1_}" ]; then $1=$${$1_}; fi; \
	fi
endif

## debug code: `make resolve-path P=<path to test>`
#resolve_path += && \
#	echo "$${$1_wd} $${$1}"
#resolve-path:
#	$(call resolve_path,P) && \
#	echo "$$P"

define symlink_system_library
symlink_$1: $$(build_private_libdir)/$1.$$(SHLIB_EXT)
$$(build_private_libdir)/$1.$$(SHLIB_EXT):
	REALPATH=`$$(call spawn,$$(build_depsbindir)/libwhich) -p $$(notdir $$@)` && \
	$$(call resolve_path,REALPATH) && \
	[ -e "$$$$REALPATH" ] && \
	([ ! -e "$$@" ] || rm "$$@") && \
	echo ln -sf "$$$$REALPATH" "$$@" && \
	ln -sf "$$$$REALPATH" "$$@"
ifneq ($2,)
ifneq ($$(USE_SYSTEM_$2),0)
SYMLINK_SYSTEM_LIBRARIES += symlink_$1
endif
endif
endef

# the following excludes: libuv.a, libutf8proc.a

$(eval $(call symlink_system_library,$(LIBMNAME)))
ifneq ($(USE_SYSTEM_LIBM),0)
SYMLINK_SYSTEM_LIBRARIES += symlink_$(LIBMNAME)
else ifneq ($(USE_SYSTEM_OPENLIBM),0)
SYMLINK_SYSTEM_LIBRARIES += symlink_$(LIBMNAME)
endif

$(eval $(call symlink_system_library,libpcre2-8,PCRE))
$(eval $(call symlink_system_library,libdSFMT,DSFMT))
$(eval $(call symlink_system_library,$(LIBBLASNAME),BLAS))
ifneq ($(LIBLAPACKNAME),$(LIBBLASNAME))
$(eval $(call symlink_system_library,$(LIBLAPACKNAME),LAPACK))
endif
$(eval $(call symlink_system_library,libgmp,GMP))
$(eval $(call symlink_system_library,libmpfr,MPFR))
$(eval $(call symlink_system_library,libmbedtls,MBEDTLS))
$(eval $(call symlink_system_library,libssh2,LIBSSH2))
$(eval $(call symlink_system_library,libcurl,CURL))
$(eval $(call symlink_system_library,libgit2,LIBGIT2))
$(eval $(call symlink_system_library,libamd,SUITESPARSE))
$(eval $(call symlink_system_library,libcamd,SUITESPARSE))
$(eval $(call symlink_system_library,libccolamd,SUITESPARSE))
$(eval $(call symlink_system_library,libcholmod,SUITESPARSE))
$(eval $(call symlink_system_library,libcolamd,SUITESPARSE))
$(eval $(call symlink_system_library,libumfpack,SUITESPARSE))
$(eval $(call symlink_system_library,libspqr,SUITESPARSE))
$(eval $(call symlink_system_library,libsuitesparseconfig,SUITESPARSE))
ifneq ($(DISABLE_LIBUNWIND), 1)
$(eval $(call symlink_system_library,libunwind,LIBUNWIND))
endif
endif # WINNT

symlink_libLLVM: $(build_private_libdir)/libLLVM.dylib
$(build_private_libdir)/libLLVM.dylib:
	REALPATH=`$(LLVM_CONFIG_HOST) --libdir`/libLLVM.$(SHLIB_EXT) && \
	$(call resolve_path,REALPATH) && \
	[ -e "$$REALPATH" ] && \
	([ ! -e "$@" ] || rm "$@") && \
	echo ln -sf "$$REALPATH" "$@" && \
	ln -sf "$$REALPATH" "$@"
ifneq ($(USE_SYSTEM_LLVM),0)
ifneq ($(USE_LLVM_SHLIB),0)
SYMLINK_SYSTEM_LIBRARIES += symlink_libLLVM
endif
endif

symlink_system_libraries: $(SYMLINK_SYSTEM_LIBRARIES)

.PHONY: $(BUILDDIR)/build_h.jl.phony $(BUILDDIR)/version_git.jl.phony clean all symlink_*

clean:
	-rm -f $(BUILDDIR)/pcre_h.jl
	-rm -f $(BUILDDIR)/errno_h.jl
	-rm -f $(BUILDDIR)/build_h.jl
	-rm -f $(BUILDDIR)/build_h.jl.phony
	-rm -f $(BUILDDIR)/uv_constants.jl
	-rm -f $(BUILDDIR)/file_constants.jl
	-rm -f $(BUILDDIR)/version_git.jl
	-rm -f $(BUILDDIR)/version_git.jl.phony
	-rm -f $(build_private_libdir)/lib*.$(SHLIB_EXT)*