k0kubun	2018-08-12 23:42:25 +0900 (Sun, 12 Aug 2018)

  New Revision: 64322

  https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=64322

  Log:
    mjit_worker.c: allow showing line number
    
    on addr2line.c, if --jit-save-temps is specified.
    
    I'm going to use the line number to lazily create program counter to
    improve the performance degraded in r64283.

  Modified files:
    trunk/mjit_worker.c
Index: mjit_worker.c
===================================================================
--- mjit_worker.c	(revision 64321)
+++ mjit_worker.c	(revision 64322)
@@ -254,11 +254,20 @@ static const char *const CC_COMMON_ARGS[ https://github.com/ruby/ruby/blob/trunk/mjit_worker.c#L254
 #define CC_PATH CC_COMMON_ARGS[0]
 
 static const char *const CC_DEBUG_ARGS[] = {MJIT_DEBUGFLAGS NULL};
-static const char *const CC_OPTIMIZE_ARGS[] = {MJIT_OPTFLAGS NULL};
+static const char *const CC_OPTIMIZE_ARGS[] = {
+    MJIT_OPTFLAGS
+#ifdef USE_ELF /* at least -g1 is required to get line number on addr2line.c, and -g (-g2) is slow. */
+    "-g1",
+#endif
+    NULL
+};
 
 static const char *const CC_LDSHARED_ARGS[] = {MJIT_LDSHARED GCC_PIC_FLAGS NULL};
 static const char *const CC_DLDFLAGS_ARGS[] = {
     MJIT_DLDFLAGS
+#ifdef USE_ELF /* force disable compression to get line number on addr2line.c */
+    "-Wl,--compress-debug-sections=none",
+#endif
 #if defined __GNUC__ && !defined __clang__
     "-nostartfiles",
 # if !defined(_WIN32) && !defined(__CYGWIN__)

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