Link libponyrt correctly with --pic on Linux

The normal version of libponyrt was linked even when compiling with
--pic. Now, libponyrt-pic is linked when appropriate.

Closes ponylang#1359.

Author: Benoit Vey

CHANGELOG.md

@@ -6,6 +6,8 @@ All notable changes to the Pony compiler and standard library will be documented
 
 ### Fixed
 
+- Link the correct version of `libponyrt` when compiling with `--pic` on Linux (issue #1359)
+
 ### Added
 
 - Runtime function `pony_send_next`. This function can help optimise some message sending scenarios.

Makefile

@@ -580,6 +580,9 @@ install: libponyc libponyrt ponyc
 	@mkdir -p $(destdir)/lib
 	@mkdir -p $(destdir)/include/pony/detail
 	$(SILENT)cp $(PONY_BUILD_DIR)/libponyrt.a $(destdir)/lib
+ifeq ($(OSTYPE),linux)
+	$(SILENT)cp $(PONY_BUILD_DIR)/libponyrt-pic.a $(destdir)/lib
+endif
 ifneq ($(wildcard $(PONY_BUILD_DIR)/libponyrt.bc),)
 	$(SILENT)cp $(PONY_BUILD_DIR)/libponyrt.bc $(destdir)/lib
 endif
@@ -594,6 +597,9 @@ ifeq ($$(symlink),yes)
 	@mkdir -p $(prefix)/include/pony/detail
 	$(SILENT)ln $(symlink.flags) $(destdir)/bin/ponyc $(prefix)/bin/ponyc
 	$(SILENT)ln $(symlink.flags) $(destdir)/lib/libponyrt.a $(prefix)/lib/libponyrt.a
+ifeq ($(OSTYPE),linux)
+	$(SILENT)ln $(symlink.flags) $(destdir)/lib/libponyrt-pic.a $(prefix)/lib/libponyrt-pic.a
+endif
 ifneq ($(wildcard $(destdir)/lib/libponyrt.bc),)
 	$(SILENT)ln $(symlink.flags) $(destdir)/lib/libponyrt.bc $(prefix)/lib/libponyrt.bc
 endif
@@ -610,6 +616,9 @@ uninstall:
 	-$(SILENT)rm -rf $(destdir) 2>/dev/null ||:
 	-$(SILENT)rm $(prefix)/bin/ponyc 2>/dev/null ||:
 	-$(SILENT)rm $(prefix)/lib/libponyrt.a 2>/dev/null ||:
+ifeq ($(OSTYPE),linux)
+	-$(SILENT)rm $(prefix)/lib/libponyrt-pic.a 2>/dev/null ||:
+endif
 ifneq ($(wildcard $(prefix)/lib/libponyrt.bc),)
 	-$(SILENT)rm $(prefix)/lib/libponyrt.bc 2>/dev/null ||:
 endif
@@ -661,13 +670,19 @@ deploy: test
 	@mkdir -p $(package)/usr/lib/pony/$(package_version)/lib
 	$(SILENT)cp build/release/libponyc.a $(package)/usr/lib/pony/$(package_version)/lib
 	$(SILENT)cp build/release/libponyrt.a $(package)/usr/lib/pony/$(package_version)/lib
+ifeq ($(OSTYPE),linux)
+	$(SILENT)cp build/release/libponyrt-pic.a $(package)/usr/lib/pony/$(package_version)/lib
+endif
 ifneq ($(wildcard build/release/libponyrt.bc),)
 	$(SILENT)cp build/release/libponyrt.bc $(package)/usr/lib/pony/$(package_version)/lib
 endif
 	$(SILENT)cp build/release/ponyc $(package)/usr/lib/pony/$(package_version)/bin
 	$(SILENT)cp src/libponyrt/pony.h $(package)/usr/lib/pony/$(package_version)/include
 	$(SILENT)cp src/common/pony/detail/atomics.h $(package)/usr/lib/pony/$(package_version)/include/pony/detail
 	$(SILENT)ln -s /usr/lib/pony/$(package_version)/lib/libponyrt.a $(package)/usr/lib/libponyrt.a
+ifeq ($(OSTYPE),linux)
+	$(SILENT)ln -s /usr/lib/pony/$(package_version)/lib/libponyrt-pic.a $(package)/usr/lib/libponyrt-pic.a
+endif
 ifneq ($(wildcard /usr/lib/pony/$(package_version)/lib/libponyrt.bc),)
 	$(SILENT)ln -s /usr/lib/pony/$(package_version)/lib/libponyrt.bc $(package)/usr/lib/libponyrt.bc
 endif

src/libponyc/codegen/genexe.c

@@ -207,6 +207,8 @@ static bool link_exe(compile_t* c, ast_t* program,
   const char* ponyrt = c->opt->runtimebc ? "" :
 #if defined(PLATFORM_IS_WINDOWS)
     "ponyrt.lib";
+#elif defined(PLATFORM_IS_LINUX)
+    c->opt->pic ? "-lponyrt-pic" : "-lponyrt";
 #else
     "-lponyrt";
 #endif