re PR fortran/33862 (Support .FTN file extension for Fortran fixed-format source files)

2007-10-27  Tobias Burnus  <burnus@net-b.de>

        PR fortran/33862
        * lang-specs.h: Support .ftn and .FTN extension, use CPP for .FOR.
        * options.c (form_from_filename): Support .ftn extension.
        * gfortran.texi: Document support of .for and .ftn file extension.

From-SVN: r129680

gcc/fortran/ChangeLog

+2007-10-27  Tobias Burnus  <burnus@net-b.de>
+
+	PR fortran/33862
+	* lang-specs.h: Support .ftn and .FTN extension, use CPP for .FOR.
+	* options.c (form_from_filename): Support .ftn extension.
+	* gfortran.texi: Document support of .for and .ftn file extension.
+
 2007-10-26  Jerry DeLisle  <jvdelisle@gcc.gnu.org>
 
 	PR fortran/33162

gcc/fortran/gfortran.texi

@@ -368,11 +368,11 @@ the relevant compiler front-end program (e.g., @command{f951} for
 Fortran) for each file in the source code, and then calls the assembler
 and linker as appropriate to produce the compiled output. In a copy of
 GCC which has been compiled with Fortran language support enabled,
-@command{gcc} will recognize files with @file{.f}, @file{.f90}, @file{.f95},
-and @file{.f03} extensions as Fortran source code, and compile it
-accordingly.  A @command{gfortran} driver program is also provided,
-which is identical to @command{gcc} except that it automatically links
-the Fortran runtime libraries into the compiled program.
+@command{gcc} will recognize files with @file{.f}, @file{.for}, @file{.ftn},
+@file{.f90}, @file{.f95}, and @file{.f03} extensions as Fortran source code,
+and compile it accordingly. A @command{gfortran} driver program is also
+provided, which is identical to @command{gcc} except that it automatically
+links the Fortran runtime libraries into the compiled program.
 
 This manual specifically documents the Fortran front end, which handles
 the programming language's syntax and semantics.  The aspects of GCC
@@ -399,10 +399,11 @@ through a C preprocessor (CPP; sometimes also called Fortran preprocessor,
 FPP) to allow for conditional compilation. In case of GNU Fortran
 this is the GNU C Preprocessor in the traditional mode. On systems with
 case-preserving file names, the preprocessor is automatically invoked if the
-file extension is @code{.F}, @code{.F90}, @code{.F95} or @code{.F03};
-otherwise use for fixed-format code the option @code{-x f77-cpp-input}
-and for free-format code @code{-x f95-cpp-input}. Invocation of the
-preprocessor can be suppressed using @code{-x f77} or @code{-x f95}.
+file extension is @code{.F}, @code{.FOR}, @code{.FTN}, @code{.F90},
+@code{.F95} or @code{.F03}; otherwise use for fixed-format code the option
+@code{-x f77-cpp-input} and for free-format code @code{-x f95-cpp-input}.
+Invocation of the preprocessor can be suppressed using @code{-x f77} or
+@code{-x f95}.
 
 If the GNU Fortran invoked the preprocessor, @code{__GFORTRAN__}
 is defined and @code{__GNUC__}, @code{__GNUC_MINOR__} and

gcc/fortran/lang-specs.h

@@ -21,6 +21,8 @@
    for the f95 language.  */
 
 {".F",   "@f77-cpp-input", 0, 0, 0},
+{".FOR", "@f77-cpp-input", 0, 0, 0},
+{".FTN", "@f77-cpp-input", 0, 0, 0},
 {".fpp", "@f77-cpp-input", 0, 0, 0},
 {".FPP", "@f77-cpp-input", 0, 0, 0},
 {"@f77-cpp-input",
@@ -45,6 +47,6 @@
          %{!nostdinc:-fintrinsic-modules-path finclude%s} %{!fsyntax-only:%(invoke_as)}}", 0, 0, 0},
 {".f",   "@f77", 0, 0, 0},
 {".for", "@f77", 0, 0, 0},
-{".FOR", "@f77", 0, 0, 0},
+{".ftn", "@f77", 0, 0, 0},
 {"@f77", "%{!E:f951 %i %{!ffree-form:-ffixed-form} %(cc1_options) %{J*} %{I*}\
          %{!nostdinc:-fintrinsic-modules-path finclude%s} %{!fsyntax-only:%(invoke_as)}}", 0, 0, 0},

gcc/fortran/options.c

@@ -161,6 +161,9 @@ form_from_filename (const char *filename)
     ".for", FORM_FIXED}
     ,
     {
+    ".ftn", FORM_FIXED}
+    ,
+    {
     "", FORM_UNKNOWN}
   };		/* sentinel value */