Introduce libjuliarepl to break dependence on runtime libraries (#36588)

Author: staticfloat

CONTRIBUTING.md

@@ -189,7 +189,7 @@ Note: These instructions are for adding to or improving functionality in the bas
 
 Add new code to Julia's base libraries as follows (this is the "basic" approach; see a more efficient approach in the next section):
 
- 1. Edit the appropriate file in the `base/` directory, or add new files if necessary. Create tests for your functionality and add them to files in the `test/` directory. If you're editing C or Scheme code, most likely it lives in `src/` or one of its subdirectories, although some aspects of Julia's REPL initialization live in `ui/`.
+ 1. Edit the appropriate file in the `base/` directory, or add new files if necessary. Create tests for your functionality and add them to files in the `test/` directory. If you're editing C or Scheme code, most likely it lives in `src/` or one of its subdirectories, although some aspects of Julia's REPL initialization live in `cli/`.
 
  2. Add any new files to `sysimg.jl` in order to build them into the Julia system image.
 

HISTORY.md

@@ -4860,7 +4860,7 @@ New language features
     shell. For example:
 
         julia> ;ls
-        CONTRIBUTING.md  Makefile           VERSION      deps/      julia@  ui/
+        CONTRIBUTING.md  Makefile           VERSION      cli/       deps/   julia@
         DISTRIBUTING.md  NEWS.md            Windows.inc  doc/       src/    usr/
         LICENSE.md       README.md          base/        etc/       test/
         Make.inc         README.windows.md  contrib/     examples/  tmp/

Make.inc

@@ -608,10 +608,29 @@ else
 endif
 
 # On Windows, we want shared library files to end up in $(build_bindir), instead of $(build_libdir)
+# We also don't really have a private bindir on windows right now, due to lack of RPATH.
 ifeq ($(OS),WINNT)
 build_shlibdir := $(build_bindir)
+shlibdir := $(bindir)
+private_shlibdir := $(bindir)
 else
 build_shlibdir := $(build_libdir)
+shlibdir := $(libdir)
+private_shlibdir := $(private_libdir)
+endif
+
+# If we're on windows, don't do versioned shared libraries.  If we're on OSX,
+# put the version number before the .dylib.  Otherwise, put it after.
+ifeq ($(OS), WINNT)
+JL_MAJOR_MINOR_SHLIB_EXT := $(SHLIB_EXT)
+else
+ifeq ($(OS), Darwin)
+JL_MAJOR_MINOR_SHLIB_EXT := $(SOMAJOR).$(SOMINOR).$(SHLIB_EXT)
+JL_MAJOR_SHLIB_EXT := $(SOMAJOR).$(SHLIB_EXT)
+else
+JL_MAJOR_MINOR_SHLIB_EXT := $(SHLIB_EXT).$(SOMAJOR).$(SOMINOR)
+JL_MAJOR_SHLIB_EXT := $(SHLIB_EXT).$(SOMAJOR)
+endif
 endif
 
 ifeq ($(OS), FreeBSD)
@@ -1454,6 +1473,52 @@ JULIA_SYSIMG_debug := $(build_private_libdir)/sys-debug.$(SHLIB_EXT)
 JULIA_SYSIMG_release := $(build_private_libdir)/sys.$(SHLIB_EXT)
 JULIA_SYSIMG := $(JULIA_SYSIMG_$(JULIA_BUILD_MODE))
 
+define dep_lib_path
+$$($(PYTHON) $(call python_cygpath,$(JULIAHOME)/contrib/relative_path.py) $(1) $(2))
+endef
+
+LIBJULIA_BUILD_DEPLIB := $(call dep_lib_path,$(build_bindir),$(build_shlibdir)/libjulia.$(JL_MAJOR_MINOR_SHLIB_EXT))
+LIBJULIA_INSTALL_DEPLIB := $(call dep_lib_path,$(bindir),$(shlibdir)/libjulia.$(JL_MAJOR_MINOR_SHLIB_EXT))
+
+LIBJULIA_DEBUG_BUILD_DEPLIB := $(call dep_lib_path,$(build_bindir),$(build_shlibdir)/libjulia-debug.$(JL_MAJOR_MINOR_SHLIB_EXT))
+LIBJULIA_DEBUG_INSTALL_DEPLIB := $(call dep_lib_path,$(bindir),$(shlibdir)/libjulia-debug.$(JL_MAJOR_MINOR_SHLIB_EXT))
+
+ifeq ($(OS),WINNT)
+ifeq ($(BINARY),32)
+LIBGCC_NAME := libgcc_s_sjlj-1.$(SHLIB_EXT)
+else
+LIBGCC_NAME := libgcc_s_seh-1.$(SHLIB_EXT)
+endif
+LIBOPENLIBM_NAME := libopenlibm.$(SHLIB_EXT)
+endif
+ifeq ($(OS),Darwin)
+LIBGCC_NAME := libgcc_s.1.$(SHLIB_EXT)
+LIBOPENLIBM_NAME := libopenlibm.3.$(SHLIB_EXT)
+endif
+ifneq ($(findstring $(OS),Linux FreeBSD),)
+LIBGCC_NAME := libgcc_s.$(SHLIB_EXT).1
+LIBOPENLIBM_NAME := libopenlibm.$(SHLIB_EXT).3
+endif
+
+LIBGCC_BUILD_DEPLIB := $(call dep_lib_path,$(build_bindir),$(build_shlibdir)/$(LIBGCC_NAME))
+LIBGCC_INSTALL_DEPLIB := $(call dep_lib_path,$(bindir),$(private_shlibdir)/$(LIBGCC_NAME))
+LIBOPENLIBM_BUILD_DEPLIB := $(call dep_lib_path,$(build_bindir),$(build_shlibdir)/$(LIBOPENLIBM_NAME))
+LIBOPENLIBM_INSTALL_DEPLIB := $(call dep_lib_path,$(bindir),$(private_shlibdir)/$(LIBOPENLIBM_NAME))
+
+# We list:
+#  * libgcc_s, because FreeBSD needs to load ours, not the system one.
+#  * libopenlibm, because Windows has an untrustworthy libm, and we want to use ours more than theirs
+#  * libjulia, which must always come last.
+#
+# We need these four separate variables because:
+#  * debug builds must link against libjuliadebug, not libjulia
+#  * install time relative paths are not equal to build time relative paths (../lib vs. ../lib/julia)
+# That second point will no longer be true for most deps once they are placed within Artifacts directories.
+LOADER_BUILD_DEP_LIBS = $(LIBGCC_BUILD_DEPLIB):$(LIBOPENLIBM_BUILD_DEPLIB):$(LIBJULIA_BUILD_DEPLIB)
+LOADER_DEBUG_BUILD_DEP_LIBS = $(LIBGCC_BUILD_DEPLIB):$(LIBOPENLIBM_BUILD_DEPLIB):$(LIBJULIA_DEBUG_BUILD_DEPLIB)
+LOADER_INSTALL_DEP_LIBS = $(LIBGCC_INSTALL_DEPLIB):$(LIBOPENLIBM_INSTALL_DEPLIB):$(LIBJULIA_INSTALL_DEPLIB)
+LOADER_DEBUG_INSTALL_DEP_LIBS = $(LIBGCC_INSTALL_DEPLIB):$(LIBOPENLIBM_INSTALL_DEPLIB):$(LIBJULIA_DEBUG_INSTALL_DEPLIB)
+
 # Colors for make
 ifndef VERBOSE
 VERBOSE := 0

Makefile

@@ -9,7 +9,7 @@ all: debug release
 # sort is used to remove potential duplicates
 DIRS := $(sort $(build_bindir) $(build_depsbindir) $(build_libdir) $(build_private_libdir) $(build_libexecdir) $(build_includedir) $(build_includedir)/julia $(build_sysconfdir)/julia $(build_datarootdir)/julia $(build_datarootdir)/julia/stdlib $(build_man1dir))
 ifneq ($(BUILDROOT),$(JULIAHOME))
-BUILDDIRS := $(BUILDROOT) $(addprefix $(BUILDROOT)/,base src src/flisp src/support src/clangsa ui doc deps stdlib test test/embedding test/llvmpasses)
+BUILDDIRS := $(BUILDROOT) $(addprefix $(BUILDROOT)/,base src src/flisp src/support src/clangsa cli doc deps stdlib test test/embedding test/llvmpasses)
 BUILDDIRMAKE := $(addsuffix /Makefile,$(BUILDDIRS)) $(BUILDROOT)/sysimage.mk
 DIRS := $(DIRS) $(BUILDDIRS)
 $(BUILDDIRMAKE): | $(BUILDDIRS)
@@ -46,7 +46,7 @@ julia_flisp.boot.inc.phony: julia-deps
 $(BUILDROOT)/doc/_build/html/en/index.html: $(shell find $(BUILDROOT)/base $(BUILDROOT)/doc \( -path $(BUILDROOT)/doc/_build -o -path $(BUILDROOT)/doc/deps -o -name *_constants.jl -o -name *_h.jl -o -name version_git.jl \) -prune -o -type f -print)
 	@$(MAKE) docs
 
-julia-symlink: julia-ui-$(JULIA_BUILD_MODE)
+julia-symlink: julia-cli-$(JULIA_BUILD_MODE)
 ifeq ($(OS),WINNT)
 	@echo '@"%~dp0"\'"$$(echo $(call rel_path,$(BUILDROOT),$(JULIA_EXECUTABLE)) | tr / '\\')" '%*' > $(BUILDROOT)/julia.bat
 	chmod a+x $(BUILDROOT)/julia.bat
@@ -74,16 +74,16 @@ julia-libllvmcalltest: julia-deps
 julia-src-release julia-src-debug : julia-src-% : julia-deps julia_flisp.boot.inc.phony
 	@$(MAKE) $(QUIET_MAKE) -C $(BUILDROOT)/src libjulia-$*
 
-julia-ui-release julia-ui-debug : julia-ui-% : julia-src-%
-	@$(MAKE) $(QUIET_MAKE) -C $(BUILDROOT)/ui julia-$*
+julia-cli-release julia-cli-debug : julia-cli-% : julia-src-%
+	@$(MAKE) $(QUIET_MAKE) -C $(BUILDROOT)/cli julia-$*
 
-julia-sysimg-ji : julia-stdlib julia-base julia-ui-$(JULIA_BUILD_MODE) | $(build_private_libdir)
+julia-sysimg-ji : julia-stdlib julia-base julia-cli-$(JULIA_BUILD_MODE) | $(build_private_libdir)
 	@$(MAKE) $(QUIET_MAKE) -C $(BUILDROOT) -f sysimage.mk sysimg-ji JULIA_EXECUTABLE='$(JULIA_EXECUTABLE)'
 
-julia-sysimg-bc : julia-stdlib julia-base julia-ui-$(JULIA_BUILD_MODE) | $(build_private_libdir)
+julia-sysimg-bc : julia-stdlib julia-base julia-cli-$(JULIA_BUILD_MODE) | $(build_private_libdir)
 	@$(MAKE) $(QUIET_MAKE) -C $(BUILDROOT) -f sysimage.mk sysimg-bc JULIA_EXECUTABLE='$(JULIA_EXECUTABLE)'
 
-julia-sysimg-release julia-sysimg-debug : julia-sysimg-% : julia-sysimg-ji julia-ui-%
+julia-sysimg-release julia-sysimg-debug : julia-sysimg-% : julia-sysimg-ji julia-cli-%
 	@$(MAKE) $(QUIET_MAKE) -C $(BUILDROOT) -f sysimage.mk sysimg-$*
 
 julia-debug julia-release : julia-% : julia-sysimg-% julia-symlink julia-libccalltest julia-libllvmcalltest julia-base-cache
@@ -154,9 +154,9 @@ julia-base-cache: julia-sysimg-$(JULIA_BUILD_MODE) | $(DIRS) $(build_datarootdir
 		$(call cygpath_w,$(build_datarootdir)/julia/base.cache))
 
 # public libraries, that are installed in $(prefix)/lib
-JL_TARGETS := julia
+JL_TARGETS := julia julialoader
 ifeq ($(BUNDLE_DEBUG_LIBS),1)
-JL_TARGETS += julia-debug
+JL_TARGETS += julia-debug julialoader-debug
 endif
 
 # private libraries, that are installed in $(prefix)/lib/julia
@@ -268,7 +268,7 @@ endif
 
 
 define stringreplace
-	$(build_depsbindir)/stringreplace $$(strings -t x - $1 | grep '$2' | awk '{print $$1;}') '$3' 255 "$(call cygpath_w,$1)"
+	$(build_depsbindir)/stringreplace $$(strings -t x - $1 | grep $2 | awk '{print $$1;}') $3 255 "$(call cygpath_w,$1)"
 endef
 
 # Run fixup-libgfortran on all platforms but Windows and FreeBSD. On FreeBSD we
@@ -413,8 +413,19 @@ endif
 	if [ $(BUNDLE_DEBUG_LIBS) = 1 ]; then \
 		$(call stringreplace,$${DEBUG_TARGET},sys-debug.$(SHLIB_EXT)$$,$(private_libdir_rel)/sys-debug.$(SHLIB_EXT)); \
 	fi;
+endif
+
+ifneq ($(LOADER_BUILD_DEP_LIBS),$(LOADER_INSTALL_DEP_LIBS))
+	# Next, overwrite relative path to libjulia in our loaders if $(LOADER_BUILD_DEP_LIBS) != $(LOADER_INSTALL_DEP_LIBS)
+	$(call stringreplace,$(DESTDIR)$(bindir)/julia,$(LOADER_BUILD_DEP_LIBS)$$,$(LOADER_INSTALL_DEP_LIBS))
+	$(call stringreplace,$(DESTDIR)$(shlibdir)/libjulialoader.$(JL_MAJOR_MINOR_SHLIB_EXT),$(LOADER_BUILD_DEP_LIBS)$$,$(LOADER_INSTALL_DEP_LIBS))
 
+ifeq ($(BUNDLE_DEBUG_LIBS),1)
+	$(call stringreplace,$(DESTDIR)$(bindir)/julia-debug,$(LOADER_DEBUG_BUILD_DEP_LIBS)$$,$(LOADER_DEBUG_INSTALL_DEP_LIBS))
+	$(call stringreplace,$(DESTDIR)$(shlibdir)/libjulialoader-debug.$(JL_MAJOR_MINOR_SHLIB_EXT),$(LOADER_DEBUG_BUILD_DEP_LIBS)$$,$(LOADER_DEBUG_INSTALL_DEP_LIBS))
 endif
+endif
+
 	# On FreeBSD, remove the build's libdir from each library's RPATH
 ifeq ($(OS),FreeBSD)
 	$(JULIAHOME)/contrib/fixup-rpath.sh "$(PATCHELF)" $(DESTDIR)$(libdir) $(build_libdir)
@@ -435,6 +446,12 @@ endif
 ifeq ($(DARWIN_FRAMEWORK),1)
 	$(MAKE) -C $(JULIAHOME)/contrib/mac/framework frameworknoinstall
 endif
+ifeq ($(OS),Linux)
+ifeq ($(prefix),$(abspath julia-$(JULIA_COMMIT)))
+	# Only fixup libstdc++ if `prefix` is not set.
+	-$(JULIAHOME)/contrib/fixup-libstdc++.sh $(DESTDIR)$(libdir) $(DESTDIR)$(private_libdir)
+endif
+endif
 
 distclean:
 	-rm -fr $(BUILDROOT)/julia-*.tar.gz $(BUILDROOT)/julia*.exe $(BUILDROOT)/julia-$(JULIA_COMMIT)
@@ -457,9 +474,7 @@ endif
 	@$(MAKE) -C $(BUILDROOT) -f $(JULIAHOME)/Makefile install
 	cp $(JULIAHOME)/LICENSE.md $(BUILDROOT)/julia-$(JULIA_COMMIT)
 ifeq ($(OS), Linux)
-	-$(JULIAHOME)/contrib/fixup-libstdc++.sh $(DESTDIR)$(libdir) $(DESTDIR)$(private_libdir)
-
-	# Copy over any bundled ca certs we picked up from the system during buildi
+	# Copy over any bundled ca certs we picked up from the system during build
 	-cp $(build_datarootdir)/julia/cert.pem $(DESTDIR)$(datarootdir)/julia/
 endif
 ifeq ($(OS), WINNT)
@@ -531,7 +546,7 @@ clean: | $(CLEAN_TARGETS)
 	@-$(MAKE) -C $(BUILDROOT)/base clean
 	@-$(MAKE) -C $(BUILDROOT)/doc clean
 	@-$(MAKE) -C $(BUILDROOT)/src clean
-	@-$(MAKE) -C $(BUILDROOT)/ui clean
+	@-$(MAKE) -C $(BUILDROOT)/cli clean
 	@-$(MAKE) -C $(BUILDROOT)/test clean
 	@-$(MAKE) -C $(BUILDROOT)/stdlib clean
 	-rm -f $(BUILDROOT)/julia
@@ -555,7 +570,7 @@ distcleanall: cleanall
 
 .PHONY: default debug release check-whitespace release-candidate \
 	julia-debug julia-release julia-stdlib julia-deps julia-deps-libs \
-	julia-ui-release julia-ui-debug julia-src-release julia-src-debug \
+	julia-cli-release julia-cli-debug julia-src-release julia-src-debug \
 	julia-symlink julia-base julia-sysimg julia-sysimg-ji julia-sysimg-release julia-sysimg-debug \
 	test testall testall1 test test-* test-revise-* \
 	clean distcleanall cleanall clean-* \

README.md

@@ -121,13 +121,13 @@ The Julia source code is organized as follows:
 | -                 | -                                                                  |
 | `base/`           | source code for the Base module (part of Julia's standard library) |
 | `stdlib/`         | source code for other standard library packages                    |
+| `cli/`            | source for the command line interface/REPL                         |
 | `contrib/`        | editor support for Julia source, miscellaneous scripts             |
 | `deps/`           | external dependencies                                              |
 | `doc/src/manual/` | source for the user manual                                         |
 | `doc/build/`      | detailed notes for building Julia                                  |
 | `src/`            | source for Julia language core                                     |
 | `test/`           | test suites                                                        |
-| `ui/`             | source for various front ends                                      |
 | `usr/`            | binaries and shared libraries loaded by Julia's standard libraries |
 
 ## Terminal, Editors and IDEs

base/Base.jl

@@ -115,6 +115,20 @@ using .Iterators: Flatten, Filter, product  # for generators
 
 include("namedtuple.jl")
 
+# For OS specific stuff
+# We need to strcat things here, before strings are really defined
+function strcat(x::String, y::String)
+    out = ccall(:jl_alloc_string, Ref{String}, (Csize_t,), Core.sizeof(x) + Core.sizeof(y))
+    GC.@preserve x y out begin
+        out_ptr = unsafe_convert(Ptr{UInt8}, out)
+        unsafe_copyto!(out_ptr, unsafe_convert(Ptr{UInt8}, x), Core.sizeof(x))
+        unsafe_copyto!(out_ptr + Core.sizeof(x), unsafe_convert(Ptr{UInt8}, y), Core.sizeof(y))
+    end
+    return out
+end
+include(strcat((length(Core.ARGS)>=2 ? Core.ARGS[2] : ""), "build_h.jl"))     # include($BUILDROOT/base/build_h.jl)
+include(strcat((length(Core.ARGS)>=2 ? Core.ARGS[2] : ""), "version_git.jl")) # include($BUILDROOT/base/version_git.jl)
+
 # numeric operations
 include("hashing.jl")
 include("rounding.jl")
@@ -163,10 +177,6 @@ include("strings/basic.jl")
 include("strings/string.jl")
 include("strings/substring.jl")
 
-# For OS specific stuff
-include(string((length(Core.ARGS)>=2 ? Core.ARGS[2] : ""), "build_h.jl"))     # include($BUILDROOT/base/build_h.jl)
-include(string((length(Core.ARGS)>=2 ? Core.ARGS[2] : ""), "version_git.jl")) # include($BUILDROOT/base/version_git.jl)
-
 # Initialize DL_LOAD_PATH as early as possible.  We are defining things here in
 # a slightly more verbose fashion than usual, because we're running so early.
 const DL_LOAD_PATH = String[]

base/rounding.jl

@@ -151,8 +151,8 @@ See [`RoundingMode`](@ref) for available modes.
 """
 :rounding
 
-setrounding_raw(::Type{<:Union{Float32,Float64}}, i::Integer) = ccall(:fesetround, Int32, (Int32,), i)
-rounding_raw(::Type{<:Union{Float32,Float64}}) = ccall(:fegetround, Int32, ())
+setrounding_raw(::Type{<:Union{Float32,Float64}}, i::Integer) = ccall((:fesetround, Base.libm_name), Int32, (Int32,), i)
+rounding_raw(::Type{<:Union{Float32,Float64}}) = ccall((:fegetround, Base.libm_name), Int32, ())
 
 rounding(::Type{T}) where {T<:Union{Float32,Float64}} = from_fenv(rounding_raw(T))
 

ui/.gitignore renamed to cli/.gitignore

@@ -5,44 +5,46 @@ include $(JULIAHOME)/deps/Versions.make
 include $(JULIAHOME)/Make.inc
 include $(JULIAHOME)/deps/llvm-ver.make
 
-override CFLAGS += $(JCFLAGS)
-override CXXFLAGS += $(JCXXFLAGS)
-override CPPFLAGS += $(JCPPFLAGS)
-
-SRCS := repl
 
 HEADERS := $(addprefix $(JULIAHOME)/src/,julia.h julia_assert.h julia_threads.h julia_internal.h options.h) \
 	$(BUILDDIR)/../src/julia_version.h $(wildcard $(JULIAHOME)/src/support/*.h) $(LIBUV_INC)/uv.h
 
-FLAGS := -I$(BUILDROOT)/src -I$(JULIAHOME)/src -I$(JULIAHOME)/src/support -I$(build_includedir)
-ifneq ($(USEMSVC), 1)
-FLAGS += -Wall -Wno-strict-aliasing -fno-omit-frame-pointer -Wc++-compat
-endif
+LOADER_CFLAGS = $(JCFLAGS) -I$(BUILDROOT)/src -I$(JULIAHOME)/src -I$(JULIAHOME)/src/support -I$(build_includedir) -ffreestanding
+LOADER_LDFLAGS = $(JLDFLAGS) -ffreestanding
 
-OBJS := $(SRCS:%=$(BUILDDIR)/%.o)
-DOBJS := $(SRCS:%=$(BUILDDIR)/%.dbg.obj)
-DEBUGFLAGS += $(FLAGS)
-SHIPFLAGS += $(FLAGS)
-JLDFLAGS += $(LDFLAGS) $(NO_WHOLE_ARCHIVE) $(OSLIBS) $(RPATH)
-
-ifeq ($(USE_SYSTEM_LIBM),0)
-ifneq ($(UNTRUSTED_SYSTEM_LIBM),0)
-JLDFLAGS += $(WHOLE_ARCHIVE) $(build_libdir)/libopenlibm.a $(NO_WHOLE_ARCHIVE)
-endif
+ifeq ($(OS),WINNT)
+LOADER_CFLAGS += -municode -mconsole -nostdlib -fno-stack-check -fno-stack-protector -mno-stack-arg-probe
 endif
 
 ifeq ($(OS),WINNT)
-JLDFLAGS += -municode
+LOADER_LDFLAGS += -municode -mconsole -nostdlib --disable-auto-import \
+                  --disable-runtime-pseudo-reloc -lntdll -lkernel32 -lpsapi
+else ifeq ($(OS),Linux)
+LOADER_LDFLAGS += -Wl,--no-as-needed -ldl -lpthread -rdynamic -lc -Wl,--as-needed
+else ifeq ($(OS),FreeBSD)
+LOADER_LDFLAGS += -Wl,--no-as-needed -ldl -lpthread -rdynamic -lc -Wl,--as-needed
+else ifeq ($(OS),Darwin)
+LOADER_LDFLAGS += -lSystem
 endif
 
+# Build list of dependent libraries that must be opened
+SHIPFLAGS  += -DDEP_LIBS="\"$(LOADER_BUILD_DEP_LIBS)\""
+DEBUGFLAGS += -DDEP_LIBS="\"$(LOADER_DEBUG_BUILD_DEP_LIBS)\""
+
+SRCS := loader_exe loader_lib
+OBJS := $(SRCS:%=$(BUILDDIR)/%.o)
+DOBJS := $(SRCS:%=$(BUILDDIR)/%.dbg.obj)
+LIB_OBJS := $(BUILDDIR)/loader_lib.o
+LIB_DOBJS := $(BUILDDIR)/loader_lib.dbg.obj
+
 default: release
 all: release debug
 release debug :  % : julia-%
 
 $(BUILDDIR)/%.o: $(SRCDIR)/%.c $(HEADERS)
-	@$(call PRINT_CC, $(CC) $(CPPFLAGS) $(CFLAGS) $(SHIPFLAGS) -c $< -o $@)
+	@$(call PRINT_CC, $(CC) $(SHIPFLAGS) $(LOADER_CFLAGS) -c $< -o $@)
 $(BUILDDIR)/%.dbg.obj: $(SRCDIR)/%.c $(HEADERS)
-	@$(call PRINT_CC, $(CC) $(CPPFLAGS) $(CFLAGS) $(DEBUGFLAGS) -c $< -o $@)
+	@$(call PRINT_CC, $(CC) $(DEBUGFLAGS) $(LOADER_CFLAGS) -c $< -o $@)
 
 ifeq ($(OS),WINNT)
 ifneq ($(USEMSVC), 1)
@@ -57,8 +59,8 @@ DOBJS += julia_res.o
 endif
 endif
 
-julia-release: $(build_bindir)/julia$(EXE)
-julia-debug: $(build_bindir)/julia-debug$(EXE)
+julia-release: $(build_bindir)/julia$(EXE) $(build_shlibdir)/libjulialoader.$(JL_MAJOR_MINOR_SHLIB_EXT)
+julia-debug: $(build_bindir)/julia-debug$(EXE) $(build_shlibdir)/libjulialoader-debug.$(JL_MAJOR_MINOR_SHLIB_EXT)
 
 # Embed an Info.plist in the julia executable
 # Create an intermediate target Info.plist for Darwin code signing.
@@ -76,16 +78,27 @@ $(build_bindir)/julia$(EXE): $(BUILDDIR)/Info.plist
 $(build_bindir)/julia-debug$(EXE): $(BUILDDIR)/Info.plist
 endif
 
-ifneq ($(USEMSVC), 1)
-CXXLD := $(CXX)
-else
-CXXLD := $(LD)
+$(build_shlibdir)/libjulialoader.$(JL_MAJOR_MINOR_SHLIB_EXT): $(LIB_OBJS)
+	@$(call PRINT_LINK, $(CC) $(LOADER_CFLAGS) -shared $(SHIPFLAGS) $^ -o $@ $(LOADER_LDFLAGS) $(RPATH_LIB))
+ifneq ($(OS), WINNT)
+	@ln -sf $(notdir $@) $(build_shlibdir)/libjulialoader.$(JL_MAJOR_SHLIB_EXT)
+	@ln -sf $(notdir $@) $(build_shlibdir)/libjulialoader.$(SHLIB_EXT)
+endif
+
+
+$(build_shlibdir)/libjulialoader-debug.$(JL_MAJOR_MINOR_SHLIB_EXT): $(LIB_DOBJS)
+	@$(call PRINT_LINK, $(CC) $(LOADER_CFLAGS) -shared $(DEBUGFLAGS) $^ -o $@ $(LOADER_LDFLAGS) $(RPATH_LIB))
+ifneq ($(OS), WINNT)
+	@ln -sf $(notdir $@) $(build_shlibdir)/libjulialoader-debug.$(JL_MAJOR_SHLIB_EXT)
+	@ln -sf $(notdir $@) $(build_shlibdir)/libjulialoader-debug.$(SHLIB_EXT)
 endif
 
 $(build_bindir)/julia$(EXE): $(OBJS)
-	@$(call PRINT_LINK, $(CXXLD) $(CXXFLAGS) $(CXXLDFLAGS) $(LINK_FLAGS) $(SHIPFLAGS) $(OBJS) -o $@ -L$(build_private_libdir) -L$(build_libdir) -L$(build_shlibdir) -ljulia $(JLDFLAGS) $(CXXLDFLAGS))
+	@$(call PRINT_LINK, $(CC) $(LOADER_CFLAGS) $(SHIPFLAGS) $^ -o $@ $(LOADER_LDFLAGS) $(RPATH))
+
 $(build_bindir)/julia-debug$(EXE): $(DOBJS)
-	@$(call PRINT_LINK, $(CXXLD) $(CXXFLAGS) $(CXXLDFLAGS) $(LINK_FLAGS) $(DEBUGFLAGS) $(DOBJS) -o $@ -L$(build_private_libdir) -L$(build_libdir) -L$(build_shlibdir) -ljulia-debug $(JLDFLAGS) $(CXXLDFLAGS))
+	@$(call PRINT_LINK, $(CC) $(LOADER_CFLAGS) $(DEBUGFLAGS) $^ -o $@ $(LOADER_LDFLAGS) $(RPATH))
+
 
 clean: | $(CLEAN_TARGETS)
 	rm -f *.o *.dbg.obj