Improve consistency of SONAME usage, fix debug installation

SONAME and RPATH inconsistency resulted in `julia`/`julia-debug`
occasionally being unable to find `libjulia.so`, due to
`libjulia-internal` not having the right RPATH set (it was set to
`$ORIGIN:$ORIGIN/julia`, when it now needs to be set to
`$ORIGIN:$ORIGIN/..`).  Use `patchelf` to address this during `make
install`.

We also want to use the SONAME of e.g. `libjulia` as much as possible,
so as to avoid searching the filesystem for libraries that are already
opened.

Also fix a few bugs in building `julia-debug`.

(cherry picked from commit 7aa128e)

Make.inc

@@ -328,6 +328,10 @@ endef
 $(foreach D,libdir private_libdir datarootdir libexecdir docdir sysconfdir includedir,$(eval $(call cache_rel_path,$(D),$(bindir))))
 $(foreach D,build_libdir build_private_libdir,$(eval $(call cache_rel_path,$(D),$(build_bindir))))
 
+# Save a special one: reverse_private_libdir_rel: usually just `../`, but good to be general:
+reverse_private_libdir_rel_eval = $(call rel_path,$(private_libdir),$(libdir))
+reverse_private_libdir_rel = $(call hit_cache,reverse_private_libdir_rel_eval)
+
 INSTALL_F := $(JULIAHOME)/contrib/install.sh 644
 INSTALL_M := $(JULIAHOME)/contrib/install.sh 755
 
@@ -1533,11 +1537,11 @@ define dep_lib_path
 $$($(PYTHON) $(call python_cygpath,$(JULIAHOME)/contrib/relative_path.py) $(1) $(2))
 endef
 
-LIBJULIAINTERNAL_BUILD_DEPLIB := $(call dep_lib_path,$(build_libdir),$(build_shlibdir)/libjulia-internal.$(JL_MAJOR_MINOR_SHLIB_EXT))
-LIBJULIAINTERNAL_INSTALL_DEPLIB := $(call dep_lib_path,$(libdir),$(private_shlibdir)/libjulia-internal.$(JL_MAJOR_MINOR_SHLIB_EXT))
+LIBJULIAINTERNAL_BUILD_DEPLIB := $(call dep_lib_path,$(build_libdir),$(build_shlibdir)/libjulia-internal.$(JL_MAJOR_SHLIB_EXT))
+LIBJULIAINTERNAL_INSTALL_DEPLIB := $(call dep_lib_path,$(libdir),$(private_shlibdir)/libjulia-internal.$(JL_MAJOR_SHLIB_EXT))
 
-LIBJULIAINTERNAL_DEBUG_BUILD_DEPLIB := $(call dep_lib_path,$(build_libdir),$(build_shlibdir)/libjulia-internal-debug.$(JL_MAJOR_MINOR_SHLIB_EXT))
-LIBJULIAINTERNAL_DEBUG_INSTALL_DEPLIB := $(call dep_lib_path,$(libdir),$(private_shlibdir)/libjulia-internal-debug.$(JL_MAJOR_MINOR_SHLIB_EXT))
+LIBJULIAINTERNAL_DEBUG_BUILD_DEPLIB := $(call dep_lib_path,$(build_libdir),$(build_shlibdir)/libjulia-internal-debug.$(JL_MAJOR_SHLIB_EXT))
+LIBJULIAINTERNAL_DEBUG_INSTALL_DEPLIB := $(call dep_lib_path,$(libdir),$(private_shlibdir)/libjulia-internal-debug.$(JL_MAJOR_SHLIB_EXT))
 
 ifeq ($(OS),WINNT)
 ifeq ($(BINARY),32)

Makefile

@@ -87,7 +87,7 @@ julia-sysimg-bc : julia-stdlib julia-base julia-cli-$(JULIA_BUILD_MODE) julia-sr
 julia-sysimg-release julia-sysimg-debug : julia-sysimg-% : julia-sysimg-ji julia-cli-%
 	@$(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
+julia-debug julia-release : julia-% : julia-sysimg-% julia-src-% julia-symlink julia-libccalltest julia-libllvmcalltest julia-base-cache
 
 debug release : % : julia-%
 
@@ -163,7 +163,7 @@ endif
 # private libraries, that are installed in $(prefix)/lib/julia
 JL_PRIVATE_LIBS-0 := libccalltest libllvmcalltest libjulia-internal
 ifeq ($(BUNDLE_DEBUG_LIBS),1)
-JL_TARGETS += libjulia-internal-debug
+JL_PRIVATE_LIBS-0 += libjulia-internal-debug
 endif
 ifeq ($(USE_GPL_LIBS), 1)
 JL_PRIVATE_LIBS-0 += libsuitesparse_wrapper
@@ -357,6 +357,15 @@ endif
 		$(call stringreplace,$${DEBUG_TARGET},sys-debug.$(SHLIB_EXT)$$,$(private_libdir_rel)/sys-debug.$(SHLIB_EXT)); \
 	fi;
 endif
+
+	# Set rpath for libjulia-internal, which is moving from `../lib` to `../lib/julia`.  We only need to do this for Linux/FreeBSD
+ifneq (,$(findstring $(OS),Linux FreeBSD))
+	$(PATCHELF) --set-rpath '$$ORIGIN:$$ORIGIN/$(reverse_private_libdir_rel)' $(DESTDIR)$(private_libdir)/libjulia-internal.$(SHLIB_EXT)
+ifeq ($(BUNDLE_DEBUG_LIBS),1)
+	$(PATCHELF) --set-rpath '$$ORIGIN:$$ORIGIN/$(reverse_private_libdir_rel)' $(DESTDIR)$(private_libdir)/libjulia-internal-debug.$(SHLIB_EXT)
+endif
+endif
+
 
 ifneq ($(LOADER_BUILD_DEP_LIBS),$(LOADER_INSTALL_DEP_LIBS))
 	# Next, overwrite relative path to libjulia-internal in our loader if $(LOADER_BUILD_DEP_LIBS) != $(LOADER_INSTALL_DEP_LIBS)

cli/Makefile

@@ -128,7 +128,7 @@ else
 endif
 
 $(build_shlibdir)/libjulia-debug.$(JL_MAJOR_MINOR_SHLIB_EXT): $(LIB_DOBJS) | $(build_shlibdir) $(build_libdir)
-	@$(call PRINT_LINK, $(CC) $(call IMPLIB_FLAGS,$@) $(LOADER_CFLAGS) -DLIBRARY_EXPORTS -shared $(DEBUGFLAGS) $(LIB_DOBJS) -o $@ $(JLIBLDFLAGS) $(LOADER_LDFLAGS) $(RPATH_LIB)) $(call SONAME_FLAGS,$(notdir $@))
+	@$(call PRINT_LINK, $(CC) $(call IMPLIB_FLAGS,$@) $(LOADER_CFLAGS) -DLIBRARY_EXPORTS -shared $(DEBUGFLAGS) $(LIB_DOBJS) -o $@ $(JLIBLDFLAGS) $(LOADER_LDFLAGS) $(RPATH_LIB)) $(call SONAME_FLAGS,libjulia-debug.$(JL_MAJOR_SHLIB_EXT))
 	$(INSTALL_NAME_CMD)libjulia-debug.$(SHLIB_EXT) $@
 ifneq ($(OS), WINNT)
 	@ln -sf $(notdir $@) $(build_shlibdir)/libjulia-debug.$(JL_MAJOR_SHLIB_EXT)

src/Makefile

@@ -131,9 +131,13 @@ DEBUGFLAGS += $(FLAGS)
 SHIPFLAGS += $(FLAGS)
 
 # if not absolute, then relative to the directory of the julia executable
-SHIPFLAGS += "-DJL_SYSTEM_IMAGE_PATH=\"$(build_private_libdir_rel)/sys.$(SHLIB_EXT)\""
+SHIPFLAGS  += "-DJL_SYSTEM_IMAGE_PATH=\"$(build_private_libdir_rel)/sys.$(SHLIB_EXT)\""
 DEBUGFLAGS += "-DJL_SYSTEM_IMAGE_PATH=\"$(build_private_libdir_rel)/sys-debug.$(SHLIB_EXT)\""
 
+# Add SONAME defines so we can embed proper `dlopen()` calls.
+SHIPFLAGS  += "-DJL_LIBJULIA_SONAME=\"libjulia.$(JL_MAJOR_SHLIB_EXT)\""       "-DJL_LIBJULIA_INTERNAL_SONAME=\"libjulia-internal.$(JL_MAJOR_SHLIB_EXT)\""
+DEBUGFLAGS += "-DJL_LIBJULIA_SONAME=\"libjulia-debug.$(JL_MAJOR_SHLIB_EXT)\"" "-DJL_LIBJULIA_INTERNAL_SONAME=\"libjulia-internal-debug.$(JL_MAJOR_SHLIB_EXT)\""
+
 ifeq ($(USE_CROSS_FLISP), 1)
 FLISPDIR := $(BUILDDIR)/flisp/host
 else
@@ -291,7 +295,7 @@ CXXLD = $(LD) -dll -export:jl_setjmp -export:jl_longjmp
 endif
 
 $(build_shlibdir)/libjulia-internal-debug.$(JL_MAJOR_MINOR_SHLIB_EXT): $(SRCDIR)/julia.expmap $(DOBJS) $(BUILDDIR)/flisp/libflisp-debug.a $(BUILDDIR)/support/libsupport-debug.a $(LIBUV)
-	@$(call PRINT_LINK, $(CXXLD) $(call IMPLIB_FLAGS,$@) $(JCXXFLAGS) $(CXXLDFLAGS) $(DEBUGFLAGS) $(DOBJS) $(RPATH_LIB) -o $@ $(JLDFLAGS) $(JLIBLDFLAGS) $(DEBUG_LIBS) $(call SONAME_FLAGS,$(notdir $@)))
+	@$(call PRINT_LINK, $(CXXLD) $(call IMPLIB_FLAGS,$@) $(JCXXFLAGS) $(CXXLDFLAGS) $(DEBUGFLAGS) $(DOBJS) $(RPATH_LIB) -o $@ $(JLDFLAGS) $(JLIBLDFLAGS) $(DEBUG_LIBS) $(call SONAME_FLAGS,libjulia-internal-debug.$(JL_MAJOR_SHLIB_EXT)))
 	$(INSTALL_NAME_CMD)libjulia-internal-debug.$(SHLIB_EXT) $@
 ifneq ($(OS), WINNT)
 	@ln -sf libjulia-internal-debug.$(JL_MAJOR_MINOR_SHLIB_EXT) $(build_shlibdir)/libjulia-internal-debug.$(JL_MAJOR_SHLIB_EXT)
@@ -306,7 +310,7 @@ $(BUILDDIR)/libjulia-internal-debug.a: $(SRCDIR)/julia.expmap $(DOBJS) $(BUILDDI
 libjulia-internal-debug: $(build_shlibdir)/libjulia-internal-debug.$(JL_MAJOR_MINOR_SHLIB_EXT) $(PUBLIC_HEADER_TARGETS)
 
 $(build_shlibdir)/libjulia-internal.$(JL_MAJOR_MINOR_SHLIB_EXT): $(SRCDIR)/julia.expmap $(OBJS) $(BUILDDIR)/flisp/libflisp.a $(BUILDDIR)/support/libsupport.a $(LIBUV)
-	@$(call PRINT_LINK, $(CXXLD) $(call IMPLIB_FLAGS,$@) $(JCXXFLAGS) $(CXXLDFLAGS) $(SHIPFLAGS) $(OBJS) $(RPATH_LIB) -o $@ $(JLDFLAGS) $(JLIBLDFLAGS) $(RELEASE_LIBS) $(call SONAME_FLAGS,$(notdir $@)))
+	@$(call PRINT_LINK, $(CXXLD) $(call IMPLIB_FLAGS,$@) $(JCXXFLAGS) $(CXXLDFLAGS) $(SHIPFLAGS) $(OBJS) $(RPATH_LIB) -o $@ $(JLDFLAGS) $(JLIBLDFLAGS) $(RELEASE_LIBS) $(call SONAME_FLAGS,libjulia-internal.$(JL_MAJOR_SHLIB_EXT)))
 	$(INSTALL_NAME_CMD)libjulia-internal.$(SHLIB_EXT) $@
 ifneq ($(OS), WINNT)
 	@ln -sf libjulia-internal.$(JL_MAJOR_MINOR_SHLIB_EXT) $(build_shlibdir)/libjulia-internal.$(JL_MAJOR_SHLIB_EXT)

src/dlload.c

@@ -149,7 +149,7 @@ JL_DLLEXPORT void *jl_load_dynamic_library(const char *modname, unsigned flags,
     int n_extensions = endswith_extension(modname) ? 1 : N_EXTENSIONS;
 
     /*
-      this branch returns handle of libjulia
+      this branch returns handle of libjulia-internal
     */
     if (modname == NULL) {
 #ifdef _OS_WINDOWS_

src/init.c

@@ -661,7 +661,7 @@ void _julia_init(JL_IMAGE_SEARCH rel)
 
     // Load libjulia-internal (which contains this function), and libjulia, explicitly.
     jl_libjulia_internal_handle = jl_load_dynamic_library(NULL, JL_RTLD_DEFAULT, 1);
-    jl_libjulia_handle = jl_load_dynamic_library(JL_LIBJULIA_DL_LIBNAME, JL_RTLD_DEFAULT, 1);
+    jl_libjulia_handle = jl_load_dynamic_library(JL_LIBJULIA_SONAME, JL_RTLD_DEFAULT, 1);
 #ifdef _OS_WINDOWS_
     jl_ntdll_handle = jl_dlopen("ntdll.dll", 0); // bypass julia's pathchecking for system dlls
     jl_kernel32_handle = jl_dlopen("kernel32.dll", 0);