cpp.c (gfc_cpp_init): Add pre-defined macros for INTEGER(1) INTEGER(2)...

2018-12-25  Steven G. Kargl  <kargl@gcc.gnu.org>

	* cpp.c (gfc_cpp_init):  Add pre-defined macros for INTEGER(1)
	INTEGER(2), INTEGER(8) and INTEGER(16) if supported.  Add pre-defined
	macros for REAL(10) and REAL(16) if available.
	* gfortran.texi: Document new macros.

From-SVN: r267464

diff --git a/gcc/fortran/ChangeLog b/gcc/fortran/ChangeLog
index 827cd96..e260028 100644 (file)
--- a/gcc/fortran/ChangeLog
+++ b/gcc/fortran/ChangeLog
@@ -1,3 +1,10 @@
+2018-12-29  Steven G. Kargl  <kargl@gcc.gnu.org>
+
+       * cpp.c (gfc_cpp_init):  Add pre-defined macros for INTEGER(1)
+       INTEGER(2), INTEGER(8) and INTEGER(16) if supported.  Add pre-defined
+       macros for REAL(10) and REAL(16) if available.
+       * gfortran.texi: Document new macros.
+
 2018-12-27  Steven G. Kargl  <kargl@gcc.gnu.org>
 
        PR fortran/81027

diff --git a/gcc/fortran/cpp.c b/gcc/fortran/cpp.c
index 95b08a9..bf4d891 100644 (file)
--- a/gcc/fortran/cpp.c
+++ b/gcc/fortran/cpp.c
@@ -609,6 +609,28 @@ gfc_cpp_init (void)
                         opt->arg, opt->code == OPT_MQ);
     }
 
+  /* Pre-defined macros for non-required INTEGER kind types.  */
+  for (gfc_integer_info *itype = gfc_integer_kinds; itype->kind != 0; itype++)
+    {
+      if (itype->kind == 1)
+       cpp_define (cpp_in, "__GFC_INT_1__=1");
+      if (itype->kind == 2)
+       cpp_define (cpp_in, "__GFC_INT_2__=1");
+      if (itype->kind == 8)
+       cpp_define (cpp_in, "__GFC_INT_8__=1");
+      if (itype->kind == 16)
+       cpp_define (cpp_in, "__GFC_INT_16__=1");
+    }
+
+  /* Pre-defined macros for non-required REAL kind types.  */
+  for (gfc_real_info *rtype = gfc_real_kinds; rtype->kind != 0; rtype++)
+    {
+      if (rtype->kind == 10)
+       cpp_define (cpp_in, "__GFC_REAL_10__=1");
+      if (rtype->kind == 16)
+       cpp_define (cpp_in, "__GFC_REAL_16__=1");
+    }
+
   if (gfc_cpp_option.working_directory
       && gfc_cpp_option.preprocess_only && !gfc_cpp_option.no_line_commands)
     pp_dir_change (cpp_in, get_src_pwd ());

diff --git a/gcc/fortran/gfortran.texi b/gcc/fortran/gfortran.texi
index 8654601..60c5d5d 100644 (file)
--- a/gcc/fortran/gfortran.texi
+++ b/gcc/fortran/gfortran.texi
@@ -418,10 +418,18 @@ statement, the included file is not preprocessed.  To preprocess included
 files, use the equivalent preprocessor statement @code{#include}.
 
 If GNU Fortran invokes the preprocessor, @code{__GFORTRAN__}
-is defined and @code{__GNUC__}, @code{__GNUC_MINOR__} and
+is defined.  The macros @code{__GNUC__}, @code{__GNUC_MINOR__} and
 @code{__GNUC_PATCHLEVEL__} can be used to determine the version of the
 compiler.  See @ref{Top,,Overview,cpp,The C Preprocessor} for details.
 
+GNU Fortran supports a number of @code{INTEGER} and @code{REAL} kind types
+in additional to the kind types required by the Fortran standard.
+The availability of any given kind type is architecture dependent.  The
+following pre-defined preprocessor macros can be used to conditional
+include code for these additional kind types: @code{__GFC_INTEGER_1__},
+@code{__GFC_INTEGER_2__}, @code{__GFC_INTEGER_8__}, @code{__GFC_INTEGER_16__},
+@code{__GFC_REAL_10__}, and @code{__GFC_REAL_16__}.
+
 While CPP is the de-facto standard for preprocessing Fortran code,
 Part 3 of the Fortran 95 standard (ISO/IEC 1539-3:1998) defines
 Conditional Compilation, which is not widely used and not directly