Export some missing symbols for MJIT

tool/ruby_vm/views/_insn_name_info.erb: on Linux, rb_vm_insn_name_offset
was needed to compile with --jit-debug (Usually --jit-debug requires
more symbols than the situation without --jit-debug because -O2 skips
some functions to compile).

vm.c: when running transform_mjit_header.rb with --jit-wait,
rb_source_location_cstr was repoted to be missing.

string.c: ditto, for rb_str_eql
numeric.c: ditto, for rb_float_eql

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@62313 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

include/ruby/defines.h

@@ -270,9 +270,11 @@ void xfree(void*);
 #define RUBY_FUNC_EXPORTED
 #endif
 
-/* MJIT_FUNC_EXPORTED is used for functions which are exported only for MJIT
+/* These macros are used for functions which are exported only for MJIT
    and NOT ensured to be exported in future versions. */
 #define MJIT_FUNC_EXPORTED RUBY_FUNC_EXPORTED
+#define MJIT_SYMBOL_EXPORT_BEGIN RUBY_SYMBOL_EXPORT_BEGIN
+#define MJIT_SYMBOL_EXPORT_END RUBY_SYMBOL_EXPORT_END
 
 #ifndef RUBY_EXTERN
 #define RUBY_EXTERN extern

numeric.c

@@ -1603,7 +1603,7 @@ flo_le(VALUE x, VALUE y)
  *  so an implementation-dependent value is returned.
  */
 
-VALUE
+MJIT_FUNC_EXPORTED VALUE
 rb_float_eql(VALUE x, VALUE y)
 {
     if (RB_TYPE_P(y, T_FLOAT)) {

string.c

@@ -3263,7 +3263,7 @@ rb_str_equal(VALUE str1, VALUE str2)
  * Two strings are equal if they have the same length and content.
  */
 
-VALUE
+MJIT_FUNC_EXPORTED VALUE
 rb_str_eql(VALUE str1, VALUE str2)
 {
     if (str1 == str2) return Qtrue;

tool/ruby_vm/views/_insn_name_info.erb

@@ -13,7 +13,9 @@
 %
 CONSTFUNC(MAYBE_UNUSED(static const char *insn_name(VALUE insn)));
 extern const char *rb_vm_insn_name_info;
+MJIT_SYMBOL_EXPORT_BEGIN
 extern const unsigned short rb_vm_insn_name_offset[];
+MJIT_SYMBOL_EXPORT_END
 
 #ifdef RUBY_VM_INSNS_INFO
 const unsigned short rb_vm_insn_name_offset[] = {

vm.c

@@ -1302,7 +1302,7 @@ rb_source_location(int *pline)
     }
 }
 
-const char *
+MJIT_FUNC_EXPORTED const char *
 rb_source_location_cstr(int *pline)
 {
     VALUE path = rb_source_location(pline);