cs: link Unix variants of racket with exported symbols

I'm not sure this is a good idea, but it doesn't apear to be a
particularly bad idea. Exporting symbols just makes the executable
size slightly larger.

Closes #3617

racket/src/cs/c/Makefile.in

@@ -22,6 +22,7 @@ BASE_CFLAGS = @CFLAGS@ @CPPFLAGS@
 CFLAGS = $(BASE_CFLAGS) -I$(SCHEME_TARGET_INC) -I$(srcdir)/../../rktio -Irktio -I.
 LDFLAGS = @LDFLAGS@
 LIBS = @LIBS@
+LINK_DYNAMIC = @LINK_DYNAMIC@
 AR = @AR@
 ARFLAGS = @ARFLAGS@
 RANLIB = @RANLIB@
@@ -229,11 +230,11 @@ BOOT_OBJ_DEPS = boot.o $(SCHEME_LIB_DEPS) rktio/librktio.a
 BOOT_OBJS = boot.o $(SCHEME_LIBS) rktio/librktio.a
 
 raw_racketcs@NOT_OSX@: main.o boot.o $(BOOT_OBJ_DEPS)
-	$(CC) $(CFLAGS) -o raw_racketcs main.o $(BOOT_OBJS) $(LDFLAGS) $(LIBS)
+	$(CC) $(CFLAGS) -o raw_racketcs main.o $(BOOT_OBJS) $(LDFLAGS) $(LIBS) $(LINK_DYNAMIC)
 	@POST_LINKER@ raw_racketcs
 
 raw_gracketcs: grmain.o boot.o $(BOOT_OBJ_DEPS)
-	$(CC) $(CFLAGS) -o raw_gracketcs grmain.o $(BOOT_OBJS) $(LDFLAGS) $(LIBS)
+	$(CC) $(CFLAGS) -o raw_gracketcs grmain.o $(BOOT_OBJS) $(LDFLAGS) $(LIBS) $(LINK_DYNAMIC)
 	@POST_LINKER@ raw_gracketcs
 
 petite-v.boot: $(SCHEME_TARGET_INC)/petite.boot

racket/src/cs/c/configure

@@ -678,6 +678,7 @@ WINDRES
 STATIC_AR
 ARFLAGS
 AR
+LINK_DYNAMIC
 LD
 upsrcdir
 EGREP
@@ -4344,6 +4345,7 @@ case "$host_os" in
     CFLAGS="${CFLAGS} -I/usr/local/include"
     LDFLAGS="${LDFLAGS} -L/usr/local/lib"
     LIBS="${LIBS} -lm -lpthread"
+    LINK_DYNAMIC="-rdynamic"
     add_iconv_lib="-liconv"
     CPPFLAGS="${CPPFLAGS} -DELF_FIND_BOOT_SECTION"
     ELF_COMP="--expect-elf"
@@ -4353,18 +4355,22 @@ case "$host_os" in
     CFLAGS="${CFLAGS} -I/usr/local/include"
     LDFLAGS="${LDFLAGS} -L/usr/local/lib"
     LIBS="${LIBS} -lm -lpthread"
+    LINK_DYNAMIC="-Wl,--export-dynamic"
     add_iconv_lib="-liconv"
     LDFLAGS="${LDFLAGS} -Wl,-zwxneeded"
     CPPFLAGS="${CPPFLAGS} -DELF_FIND_BOOT_SECTION"
     ELF_COMP="--expect-elf"
     ;;
   bitrig*)
+    LINK_DYNAMIC="-Wl,--export-dynamic"
     ;;
   dragonfly*)
+    LINK_DYNAMIC="-Wl,--export-dynamic"
     ;;
   netbsd*)
     MACH_OS=nb
     LIBS="${LIBS} -lm -lpthread"
+    LINK_DYNAMIC="-rdynamic"
     add_iconv_lib="/usr/lib/i18n/libiconv_std.a"
     CPPFLAGS="${CPPFLAGS} -DELF_FIND_BOOT_SECTION"
     ELF_COMP="--expect-elf"
@@ -4382,6 +4388,7 @@ case "$host_os" in
         ;;
     esac
     CPPFLAGS="${CPPFLAGS} -DELF_FIND_BOOT_SECTION"
+    LINK_DYNAMIC="-rdynamic"
     ELF_COMP="--expect-elf"
     ;;
   osf1*)
@@ -5786,6 +5793,7 @@ SCHEME_CROSS_CONFIG_ARGS="--machine=${TARGET_MACH} --disable-x11 ${cs_auto_flags
 
 
 
+
 
 
 makefiles="Makefile"

racket/src/cs/c/configure.ac

@@ -227,6 +227,7 @@ case "$host_os" in
     CFLAGS="${CFLAGS} -I/usr/local/include"
     LDFLAGS="${LDFLAGS} -L/usr/local/lib"
     LIBS="${LIBS} -lm -lpthread"
+    LINK_DYNAMIC="-rdynamic"
     add_iconv_lib="-liconv"
     CPPFLAGS="${CPPFLAGS} -DELF_FIND_BOOT_SECTION"
     ELF_COMP="--expect-elf"
@@ -236,18 +237,22 @@ case "$host_os" in
     CFLAGS="${CFLAGS} -I/usr/local/include"
     LDFLAGS="${LDFLAGS} -L/usr/local/lib"
     LIBS="${LIBS} -lm -lpthread"
+    LINK_DYNAMIC="-Wl,--export-dynamic"
     add_iconv_lib="-liconv"
     LDFLAGS="${LDFLAGS} -Wl,-zwxneeded"
     CPPFLAGS="${CPPFLAGS} -DELF_FIND_BOOT_SECTION"
     ELF_COMP="--expect-elf"
     ;;
   bitrig*)
+    LINK_DYNAMIC="-Wl,--export-dynamic"
     ;;
   dragonfly*)
+    LINK_DYNAMIC="-Wl,--export-dynamic"
     ;;
   netbsd*)
     MACH_OS=nb
     LIBS="${LIBS} -lm -lpthread"
+    LINK_DYNAMIC="-rdynamic"
     add_iconv_lib="/usr/lib/i18n/libiconv_std.a"
     CPPFLAGS="${CPPFLAGS} -DELF_FIND_BOOT_SECTION"
     ELF_COMP="--expect-elf"
@@ -265,6 +270,7 @@ case "$host_os" in
         ;;
     esac
     CPPFLAGS="${CPPFLAGS} -DELF_FIND_BOOT_SECTION"
+    LINK_DYNAMIC="-rdynamic"
     ELF_COMP="--expect-elf"
     ;;
   osf1*)
@@ -773,6 +779,7 @@ AC_SUBST(CPPFLAGS)
 AC_SUBST(LD)
 AC_SUBST(LDFLAGS)
 AC_SUBST(LIBS)
+AC_SUBST(LINK_DYNAMIC)
 AC_SUBST(AR)
 AC_SUBST(ARFLAGS)
 AC_SUBST(RANLIB)