diff options
Diffstat (limited to 'gcc/config')
| -rw-r--r-- | gcc/config/vms/vms-c.c | 36 |
1 files changed, 28 insertions, 8 deletions
diff --git a/gcc/config/vms/vms-c.c b/gcc/config/vms/vms-c.c index b3e0d95..4a2d19c 100644 --- a/gcc/config/vms/vms-c.c +++ b/gcc/config/vms/vms-c.c @@ -125,6 +125,8 @@ vms_pragma_nomember_alignment (cpp_reader *pfile ATTRIBUTE_UNUSED) maximum_field_alignment = 4 * BITS_PER_UNIT; else if (strcmp (arg, "quadword") == 0) maximum_field_alignment = 8 * BITS_PER_UNIT; + else if (strcmp (arg, "octaword") == 0) + maximum_field_alignment = 16 * BITS_PER_UNIT; else { error ("unhandled alignment for '#pragma nomember_alignment'"); @@ -145,17 +147,33 @@ vms_pragma_nomember_alignment (cpp_reader *pfile ATTRIBUTE_UNUSED) } } -/* The 'extern model' for public data. */ +/* The 'extern model' for public data. This drives how the following + declarations are handled: + 1) extern int name; + 2) int name; + 3) int name = 5; + See below for the behaviour as implemented by the native compiler. +*/ enum extern_model_kind { - /* Create one overlaid section per variable. */ + /* Create one overlaid section per variable. All the above declarations (1, + 2 and 3) are handled the same way: they create an overlaid section named + NAME (and initialized only for 3). No global symbol is created. + This is the VAX C behavior. */ extern_model_common_block, - /* Like unix: multiple not-initialized declarations are allowed. */ + /* Like unix: multiple not-initialized declarations are allowed. + Only one initialized definition (case 3) is allows, but multiple + uninitialize definition (case 2) are allowed. + For case 2, this creates both a section named NAME and a global symbol. + For case 3, this creates a conditional global symbol defenition and a + conditional section definition. + This is the traditional UNIX C behavior. */ extern_model_relaxed_refdef, - /* Like -fno-common. */ + /* Like -fno-common. Only one definition (cases 2 and 3) are allowed. + This is the ANSI-C model. */ extern_model_strict_refdef, /* Declarations creates symbols without storage. */ @@ -192,6 +210,8 @@ vms_pragma_extern_model (cpp_reader *pfile ATTRIBUTE_UNUSED) saved_extern_model = current_extern_model; else if (strcmp (arg, "restore") == 0) current_extern_model = saved_extern_model; + else if (strcmp (arg, "relaxed_refdef") == 0) + current_extern_model = extern_model_relaxed_refdef; else if (strcmp (arg, "strict_refdef") == 0) current_extern_model = extern_model_strict_refdef; else if (strcmp (arg, "common_block") == 0) @@ -274,10 +294,10 @@ vms_c_register_pragma (void) c_register_pragma (NULL, "standard", vms_pragma_standard); c_register_pragma (NULL, "__member_alignment", vms_pragma_member_alignment); c_register_pragma (NULL, "member_alignment", vms_pragma_member_alignment); - c_register_pragma (NULL, "__nomember_alignment", - vms_pragma_nomember_alignment); - c_register_pragma (NULL, "nomember_alignment", - vms_pragma_nomember_alignment); + c_register_pragma_with_expansion (NULL, "__nomember_alignment", + vms_pragma_nomember_alignment); + c_register_pragma_with_expansion (NULL, "nomember_alignment", + vms_pragma_nomember_alignment); c_register_pragma (NULL, "__extern_model", vms_pragma_extern_model); c_register_pragma (NULL, "extern_model", vms_pragma_extern_model); c_register_pragma (NULL, "__message", vms_pragma_message); |