PERL_GLOBAL_STRUCT_PRIVATE: fix PL_isa_DOES

I added the global string constant PL_isa_DOES recently. This caused
t/porting/libperl.t to fail under -DPERL_GLOBAL_STRUCT_PRIVATE builds.

This commit makes PL_isa_DOES be declared and defined in a similar
way to other such global constants. This is pure cargo-culting - I have no
real idea of the point of all the EXTCONST, INIT and globvar.sym stuff.

diff --git a/globvar.sym b/globvar.sym
index 2943fc6..c82dc8f 100644 (file)
--- a/globvar.sym
+++ b/globvar.sym
@@ -19,6 +19,7 @@ PL_hexdigit
 PL_inf
 PL_interp_size
 PL_interp_size_5_18_0
+PL_isa_DOES
 PL_keyword_plugin
 PL_latin1_lc
 PL_magic_data

diff --git a/perl.h b/perl.h
index 867c300..70e12bd 100644 (file)
--- a/perl.h
+++ b/perl.h
@@ -4799,6 +4799,12 @@ EXTCONST U8 PL_subversion
 EXTCONST char PL_uuemap[65]
   INIT("`!\"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_");
 
+/* a special string address whose value is "isa", but which perl knows
+ * to treat as if it were really "DOES" when printing the method name in
+ *  the "Can't call method '%s'" error message */
+EXTCONST char PL_isa_DOES[]
+  INIT("isa");
+
 #ifdef DOINIT
 EXTCONST char PL_uudmap[256] =
 #  ifdef PERL_MICRO

diff --git a/pp_hot.c b/pp_hot.c
index 4f0d094..7c98c90 100644 (file)
--- a/pp_hot.c
+++ b/pp_hot.c
@@ -4391,8 +4391,6 @@ Perl_vivify_ref(pTHX_ SV *sv, U32 to_what)
     return sv;
 }
 
-extern char PL_isa_DOES[];
-
 PERL_STATIC_INLINE HV *
 S_opmethod_stash(pTHX_ SV* meth)
 {

diff --git a/universal.c b/universal.c
index 88835f9..be39310 100644 (file)
--- a/universal.c
+++ b/universal.c
@@ -184,11 +184,6 @@ The SV can be a Perl object or the name of a Perl class.
 
 #include "XSUB.h"
 
-/* a special string address whose value is "isa", but which perl knows
- * to treat as if it were really "DOES" when printing the method name in
- *  the "Can't call method '%s'" error message */
-char PL_isa_DOES[] = "isa";
-
 bool
 Perl_sv_does_sv(pTHX_ SV *sv, SV *namesv, U32 flags)
 {
@@ -232,7 +227,7 @@ Perl_sv_does_sv(pTHX_ SV *sv, SV *namesv, U32 flags)
     methodname = newSV_type(SVt_PV);
     SvLEN(methodname) = 0;
     SvCUR(methodname) = strlen(PL_isa_DOES);
-    SvPVX(methodname) = PL_isa_DOES;
+    SvPVX(methodname) = (char *)PL_isa_DOES; /* discard 'const' qualifier */
     SvPOK_on(methodname);
     sv_2mortal(methodname);
     call_sv(methodname, G_SCALAR | G_METHOD);