c-pragma.c (handle_pragma_message): New function.
* c-pragma.c (handle_pragma_message): New function. (init_pragma): Register handle_pragma_message. * doc/extend.texi (Diagnostic Pragmas): Added #pragma message documentation. * gcc.dg/pragma-message.c: New. From-SVN: r138206
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2008-07-28 Simon Baldwin <simonb@google.com>
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* c-pragma.c (handle_pragma_message): New function.
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(init_pragma): Register handle_pragma_message.
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* doc/extend.texi (Diagnostic Pragmas): Added #pragma message
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documentation.
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2008-07-27 Victor Kaplansky <victork@il.ibm.com>
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PR tree-optimization/35252
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@ -1173,6 +1173,39 @@ handle_pragma_optimize(cpp_reader *ARG_UNUSED(dummy))
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}
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}
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/* Print a plain user-specified message. */
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static void
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handle_pragma_message (cpp_reader *ARG_UNUSED(dummy))
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{
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enum cpp_ttype token;
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tree x, message = 0;
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token = pragma_lex (&x);
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if (token == CPP_OPEN_PAREN)
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{
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token = pragma_lex (&x);
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if (token == CPP_STRING)
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message = x;
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else
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GCC_BAD ("expected a string after %<#pragma message%>");
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if (pragma_lex (&x) != CPP_CLOSE_PAREN)
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GCC_BAD ("malformed %<#pragma message%>, ignored");
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}
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else if (token == CPP_STRING)
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message = x;
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else
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GCC_BAD ("expected a string after %<#pragma message%>");
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gcc_assert (message);
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if (pragma_lex (&x) != CPP_EOF)
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warning (OPT_Wpragmas, "junk at end of %<#pragma message%>");
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if (TREE_STRING_LENGTH (message) > 1)
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inform ("#pragma message: %s", TREE_STRING_POINTER (message));
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}
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/* A vector of registered pragma callbacks. */
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DEF_VEC_O (pragma_handler);
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@ -1341,6 +1374,8 @@ init_pragma (void)
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c_register_pragma_with_expansion (0, "redefine_extname", handle_pragma_redefine_extname);
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c_register_pragma (0, "extern_prefix", handle_pragma_extern_prefix);
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c_register_pragma_with_expansion (0, "message", handle_pragma_message);
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#ifdef REGISTER_TARGET_PRAGMAS
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REGISTER_TARGET_PRAGMAS ();
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#endif
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@ -11616,6 +11616,35 @@ strict control over project policies.
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@end table
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GCC also offers a simple mechanism for printing messages during
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compilation.
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@table @code
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@item #pragma message @var{string}
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@cindex pragma, diagnostic
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Prints @var{string} as a compiler message on compilation. The message
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is informational only, and is neither a compilation warning nor an error.
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@smallexample
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#pragma message "Compiling " __FILE__ "..."
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@end smallexample
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@var{string} may be parenthesized, and is printed with location
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information. For example,
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@smallexample
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#define DO_PRAGMA(x) _Pragma (#x)
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#define TODO(x) DO_PRAGMA(message ("TODO - " #x))
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TODO(Remember to fix this)
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@end smallexample
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prints @samp{/tmp/file.c:4: note: #pragma message:
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TODO - Remember to fix this}.
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@end table
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@node Visibility Pragmas
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@subsection Visibility Pragmas
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@ -1,3 +1,7 @@
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2008-07-28 Simon Baldwin <simonb@google.com>
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* gcc.dg/pragma-message.c: New.
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2008-07-27 Victor Kaplansky <victork@il.ibm.com>
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PR tree-optimization/35252
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@ -0,0 +1,53 @@
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/* Test that #pragma message "..." writes compiler messages. */
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#pragma message /* { dg-warning "expected a string" } */
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#pragma message 0 /* { dg-warning "expected a string" } */
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#pragma message id /* { dg-warning "expected a string" } */
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#pragma message ( /* { dg-warning "expected a string" } */
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#pragma message (0 /* { dg-warning "expected a string" } */
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#pragma message (id /* { dg-warning "expected a string" } */
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#pragma message () /* { dg-warning "expected a string" } */
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#pragma message (0) /* { dg-warning "expected a string" } */
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#pragma message (id) /* { dg-warning "expected a string" } */
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/* gcc prefixes '#pragma message ...' output with filename and line number,
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then 'note: #pragma message: ', allowing dg-message to check output.
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If unexpected pragma messages are printed (anything not caught by a
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matching dg-message), dejagnu will report these as excess errors. */
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#pragma message "
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/* { dg-error "missing terminating" "" { target *-*-* } 18 } */
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/* { dg-warning "expected a string" "" { target *-*-* } 18 } */
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#pragma message "Bad 1
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/* { dg-error "missing terminating" "" { target *-*-* } 21 } */
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/* { dg-warning "expected a string" "" { target *-*-* } 21 } */
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#pragma message ("Bad 2
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/* { dg-error "missing terminating" "" { target *-*-* } 24 } */
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/* { dg-warning "expected a string" "" { target *-*-* } 24 } */
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#pragma message ("Bad 3"
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/* { dg-warning "malformed '#pragma message" "" { target *-*-* } 27 } */
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#pragma message "" junk
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/* { dg-warning "junk at end of '#pragma message'" "" { target *-*-* } 30 } */
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#pragma message ("") junk
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/* { dg-warning "junk at end of '#pragma message'" "" { target *-*-* } 33 } */
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#pragma message "" /* No output expected for empty messages. */
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#pragma message ("")
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#pragma message "Okay 1" /* { dg-message "Okay 1" } */
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#pragma message ("Okay 2") /* { dg-message "Okay 2" } */
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#define THREE "3"
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#pragma message ("Okay " THREE) /* { dg-message "Okay 3" } */
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/* Create a TODO() that prints a message on compilation. */
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#define DO_PRAGMA(x) _Pragma (#x)
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#define TODO(x) DO_PRAGMA(message ("TODO - " #x))
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TODO(Okay 4) /* { dg-message "TODO - Okay 4" } */
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#if 0
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#pragma message ("Not printed")
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#endif
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int unused; /* Silence `ISO C forbids an empty translation unit' warning. */
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