42 lines
1.5 KiB
Diff
42 lines
1.5 KiB
Diff
2012-03-07 Richard Guenther <rguenther@suse.de>
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PR pch/52518
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PR pch/38987
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* doc/invoke.texi (Precompiled Headers): Remove sentence that
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suggests you can include PCHs from inside another header.
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2009-09-22 Richard Guenther <rguenther@suse.de>
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PR pch/38987
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* files.c (pch_open_file): Disallow non-toplevel PCH inclusion.
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--- libcpp/files.c (revision 151969)
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+++ libcpp/files.c (revision 151970)
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@@ -288,6 +288,12 @@ pch_open_file (cpp_reader *pfile, _cpp_f
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if (file->name[0] == '\0' || !pfile->cb.valid_pch)
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return false;
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+ /* If the file is not included as first include from either the toplevel
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+ file or the command-line it is not a valid use of PCH. */
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+ if (pfile->all_files
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+ && pfile->all_files->next_file)
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+ return false;
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+
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flen = strlen (path);
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len = flen + sizeof (extension);
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pchname = XNEWVEC (char, len);
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--- gcc/doc/invoke.texi (revision 185028)
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+++ gcc/doc/invoke.texi (revision 185029)
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@@ -19891,9 +19891,8 @@ Only one precompiled header can be used
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@item
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A precompiled header can't be used once the first C token is seen. You
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-can have preprocessor directives before a precompiled header; you can
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-even include a precompiled header from inside another header, so long as
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-there are no C tokens before the @code{#include}.
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+can have preprocessor directives before a precompiled header; you cannot
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+include a precompiled header from inside another header.
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@item
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The precompiled header file must be produced for the same language as
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