[GR-18163] Ensure the rb_tr_abi_version symbol is always visible/exported

PullRequest: truffleruby/2749

Author: eregon

lib/cext/ABI_version.txt

@@ -1 +1 @@
-4
+5

lib/cext/include/truffleruby/truffleruby-pre.h

@@ -18,6 +18,8 @@
 extern "C" {
 #endif
 
+RUBY_SYMBOL_EXPORT_BEGIN
+
 #define TRUFFLERUBY
 
 #include <graalvm/llvm/polyglot.h>
@@ -53,6 +55,9 @@ POLYGLOT_DECLARE_TYPE(VALUE)
 extern void* rb_tr_cext;
 #define RUBY_CEXT rb_tr_cext
 
+#ifndef TRUFFLERUBY_ABI_VERSION
+#error "TRUFFLERUBY_ABI_VERSION must be defined when compiling native extensions. Does the extension override CPPFLAGS or DEFS?"
+#endif
 void* rb_tr_abi_version(void) __attribute__((weak));
 void* rb_tr_abi_version(void) {
   char* abi_version = STRINGIZE(TRUFFLERUBY_ABI_VERSION);
@@ -75,6 +80,8 @@ extern ID (*rb_tr_sym2id)(VALUE sym);
 #define offsetof(p_type,field) ((size_t)&(((p_type *)0)->field))
 #endif
 
+RUBY_SYMBOL_EXPORT_END
+
 #if defined(__cplusplus)
 }
 #endif

lib/truffle/rbconfig.rb

@@ -73,7 +73,7 @@ module RbConfig
 
   # Determine the various flags for native compilation
   optflags = ''
-  debugflags = "-DTRUFFLERUBY_ABI_VERSION=#{ruby_abi_version}"
+  debugflags = ''
   warnflags = [
     '-Wimplicit-function-declaration', # To make missing C ext functions clear
     '-Wno-int-conversion',             # MRI has VALUE defined as long while we have it as void*
@@ -84,7 +84,7 @@ module RbConfig
     '-ferror-limit=500'
   ]
 
-  defs = ''
+  defs = "-DTRUFFLERUBY_ABI_VERSION=#{ruby_abi_version}"
   cppflags = ''
   ldflags = ''
   dldflags = Truffle::Platform.darwin? ? '-Wl,-undefined,dynamic_lookup -Wl,-multiply_defined,suppress' : ''
@@ -110,7 +110,7 @@ module RbConfig
   if Truffle::Boot.get_option 'building-core-cexts'
     libtruffleruby = "#{ruby_home}/src/main/c/cext/libtruffleruby.#{dlext}"
 
-    relative_debug_paths = "-fdebug-prefix-map=#{ruby_home}=."
+    relative_debug_paths = " -fdebug-prefix-map=#{ruby_home}=."
     cppflags << relative_debug_paths
 
     warnflags << '-Wundef' # Warn for undefined preprocessor macros for core C extensions

tool/jt.rb

@@ -32,7 +32,7 @@
 CACHE_EXTRA_DIR = File.expand_path('~/.mx/cache/truffleruby')
 FileUtils.mkdir_p(CACHE_EXTRA_DIR)
 
-TRUFFLERUBY_GEM_TEST_PACK_VERSION = 'a63ccfd1f020f50ddd8d2e6cfd11242fd72edca0'
+TRUFFLERUBY_GEM_TEST_PACK_VERSION = '58d3048b49629102945a60918f31bf74547f51f9'
 
 JDEBUG = '--vm.agentlib:jdwp=transport=dt_socket,server=y,address=8000,suspend=y'
 METRICS_REPS = Integer(ENV['TRUFFLERUBY_METRICS_REPS'] || 10)