The following patches are needed in order to build GNAT with EGCS. These patches were tested with egcs-980308 and gnat-3.10p on a mips-sgi-irix6.3 system. The gnat build succeeded as per the instructions in the gnat README.BUILD file for building one library, except that CFLAGS="-O -g" and GNATLIBCFLAGS="-O -g" were substituted for the recommended "-O2" so that the build could be debugged. There was no attempt to run the resulting build against any testsuite or validation suite. -- Developers Notes: Every use of sizetype in the Ada front end should be checked to see if perhaps it should be using bitsizetype instead. The change to maybe_pad_type is just a hack to work around this problem, and may not be desirable in the long term. There are many places in the Ada front end where it calls operand_equal_p to see if two type sizes are the same. operand_equal_p fails if the two arguments have different TYPE_MODEs. sizetype and bitsizetype can have different TYPE_MODEs. Thus this code can fail if one type size is based on sizetype, and the other is based on bitsizetype. The change to maybe_pad_type fixes one very critical place where this happens. There may be others. -- Mon Mar 16 11:00:25 1998 Jim Wilson * a-gtran3.c (maybe_pad_type): Convert both size and orig_size to sizetype if they have differing modes. * a-misc.c (gnat_tree_code_type): Change from string to char array. (init_lex): Delete realloc calls for tree_code_* globals. Adjust bcopy call for gnat_tree_code_type change. * a-tree.def: Adjust for tree_code_* type changes. diff -pr gnat-3.10p-src/src/ada/a-gtran3.c egcs-980308/gcc/ada/a-gtran3.c *** gnat-3.10p-src/src/ada/a-gtran3.c Wed Aug 13 21:02:17 1997 --- egcs-980308/gcc/ada/a-gtran3.c Sat Mar 14 18:33:51 1998 *************** maybe_pad_type (type, size, align, gnat_ *** 3330,3335 **** --- 3330,3342 ---- changed. Then return if we aren't doing anything. */ if (size != 0 + && TYPE_MODE (TREE_TYPE (size)) != TYPE_MODE (TREE_TYPE (orig_size))) + { + size = convert (sizetype, size); + orig_size = convert (sizetype, orig_size); + } + + if (size != 0 && (operand_equal_p (size, orig_size, 0) || (TREE_CODE (orig_size) == INTEGER_CST && tree_int_cst_lt (size, orig_size))) diff -pr gnat-3.10p-src/src/ada/a-misc.c egcs-980308/gcc/ada/a-misc.c *** gnat-3.10p-src/src/ada/a-misc.c Wed Aug 13 21:02:18 1997 --- egcs-980308/gcc/ada/a-misc.c Tue Mar 10 18:39:13 1998 *************** extern char *main_input_filename; *** 70,77 **** #define DEFTREECODE(SYM, NAME, TYPE, LENGTH) TYPE, ! char *gnat_tree_code_type[] = { ! "x", #include "a-tree.def" }; #undef DEFTREECODE --- 70,77 ---- #define DEFTREECODE(SYM, NAME, TYPE, LENGTH) TYPE, ! char gnat_tree_code_type[] = { ! 'x', #include "a-tree.def" }; #undef DEFTREECODE *************** init_lex () *** 607,626 **** { lang_expand_expr = gnat_expand_expr; - tree_code_type - = (char **) realloc (tree_code_type, - sizeof (char *) * LAST_GNAT_TREE_CODE); - tree_code_length - = (int *) realloc (tree_code_length, - sizeof (int) * LAST_GNAT_TREE_CODE); - tree_code_name - = (char **) realloc (tree_code_name, - sizeof (char *) * LAST_GNAT_TREE_CODE); - bcopy ((char *) gnat_tree_code_type, (char *) (tree_code_type + (int) LAST_AND_UNUSED_TREE_CODE), ! ((LAST_GNAT_TREE_CODE - (int) LAST_AND_UNUSED_TREE_CODE) ! * sizeof (char *))); bcopy ((char *)gnat_tree_code_length, (char *) (tree_code_length + (int) LAST_AND_UNUSED_TREE_CODE), --- 607,615 ---- { lang_expand_expr = gnat_expand_expr; bcopy ((char *) gnat_tree_code_type, (char *) (tree_code_type + (int) LAST_AND_UNUSED_TREE_CODE), ! LAST_GNAT_TREE_CODE - (int) LAST_AND_UNUSED_TREE_CODE); bcopy ((char *)gnat_tree_code_length, (char *) (tree_code_length + (int) LAST_AND_UNUSED_TREE_CODE), diff -pr gnat-3.10p-src/src/ada/a-tree.def egcs-980308/gcc/ada/a-tree.def *** gnat-3.10p-src/src/ada/a-tree.def Wed Aug 13 21:02:20 1997 --- egcs-980308/gcc/ada/a-tree.def Tue Mar 10 18:39:54 1998 *************** *** 31,69 **** The only field used if TREE_COMPLEXITY, which contains the GNAT node number. */ ! DEFTREECODE (TRANSFORM_EXPR, "transform_expr", "e", 0) /* Perform an unchecked conversion between the input and the output. if TREE_ADDRESSABLE is set, it means this is in an LHS; in that case, we can only use techniques, such as pointer punning, that leave the expression a "name". */ ! DEFTREECODE (UNCHECKED_CONVERT_EXPR, "unchecked_convert_expr", "1", 1) /* A type that is an unconstrained array itself. This node is never passed to GCC. TREE_TYPE is the type of the fat pointer and TYPE_OBJECT_RECORD_TYPE is the type of a record containing the template and data. */ ! DEFTREECODE (UNCONSTRAINED_ARRAY_TYPE, "unconstrained_array_type", "t", 0) /* A reference to an unconstrained array. This node only exists as an intermediate node during the translation of a GNAT tree to a GCC tree; it is never passed to GCC. The only field used is operand 0, which is the fat pointer object. */ ! DEFTREECODE (UNCONSTRAINED_ARRAY_REF, "unconstrained_array_ref", "r", 1) /* An expression that returns an RTL suitable for its type. Operand 0 is an expression to be evaluated for side effects only. */ ! DEFTREECODE (NULL_EXPR, "null_expr", "e", 1) /* An expression that emits a USE for its single operand. */ ! DEFTREECODE (USE_EXPR, "use_expr", "e", 1) /* An expression that is treated as a conversion while generating code, but is used to prevent infinite recursion when conversions of biased types are involved. */ ! DEFTREECODE (GNAT_NOP_EXPR, "gnat_nop_expr", "1", 1) --- 31,69 ---- The only field used if TREE_COMPLEXITY, which contains the GNAT node number. */ ! DEFTREECODE (TRANSFORM_EXPR, "transform_expr", 'e', 0) /* Perform an unchecked conversion between the input and the output. if TREE_ADDRESSABLE is set, it means this is in an LHS; in that case, we can only use techniques, such as pointer punning, that leave the expression a "name". */ ! DEFTREECODE (UNCHECKED_CONVERT_EXPR, "unchecked_convert_expr", '1', 1) /* A type that is an unconstrained array itself. This node is never passed to GCC. TREE_TYPE is the type of the fat pointer and TYPE_OBJECT_RECORD_TYPE is the type of a record containing the template and data. */ ! DEFTREECODE (UNCONSTRAINED_ARRAY_TYPE, "unconstrained_array_type", 't', 0) /* A reference to an unconstrained array. This node only exists as an intermediate node during the translation of a GNAT tree to a GCC tree; it is never passed to GCC. The only field used is operand 0, which is the fat pointer object. */ ! DEFTREECODE (UNCONSTRAINED_ARRAY_REF, "unconstrained_array_ref", 'r', 1) /* An expression that returns an RTL suitable for its type. Operand 0 is an expression to be evaluated for side effects only. */ ! DEFTREECODE (NULL_EXPR, "null_expr", 'e', 1) /* An expression that emits a USE for its single operand. */ ! DEFTREECODE (USE_EXPR, "use_expr", 'e', 1) /* An expression that is treated as a conversion while generating code, but is used to prevent infinite recursion when conversions of biased types are involved. */ ! DEFTREECODE (GNAT_NOP_EXPR, "gnat_nop_expr", '1', 1)