Implement --disable-percent-zt to avoid %zu and %td even if the environment
claims to be C99 or greater.
This commit is contained in:
Philip.Hazel
parent
19c50b9d41
commit
149af0e21b
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@ -136,6 +136,8 @@ OPTION(PCRE2_BUILD_PCRE2_32 "Build 32 bit PCRE2 library" OFF)
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OPTION(PCRE2_DEBUG "Include debugging code" OFF)
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OPTION(DISABLE_PERCENT_ZT "Disable the use of %zu and %td (rarely needed)" OFF)
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SET(PCRE2_EBCDIC OFF CACHE BOOL
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"Use EBCDIC coding instead of ASCII. (This is rarely used outside of mainframe systems.)")
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@ -68,6 +68,11 @@ inttypes.h. This supports environments that do not have stdint.h but do have
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inttypes.h, which are known to exist. A note in the autotools documentation
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says (November 2018) that there are none known that are the other way round.
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17. Added --disable-percent-zt to "configure" (and equivalent to CMake) to
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forcibly disable the use of %zu and %td in formatting strings because there is
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at least one version of VMS that claims to be C99 but does not support these
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modifiers.
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Version 10.32 10-September-2018
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-------------------------------
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11
README
11
README
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@ -374,6 +374,15 @@ library. They are also documented in the pcre2build man page.
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If you get error messages about missing functions tgetstr, tgetent, tputs,
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tgetflag, or tgoto, this is the problem, and linking with the ncurses library
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should fix it.
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. The C99 standard defines formatting modifiers z and t for size_t and
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ptrdiff_t values, respectively. By default, PCRE2 uses these modifiers in
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environments other than Microsoft Visual Studio when __STDC_VERSION__ is
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defined and has a value greater than or equal to 199901L (indicating C99).
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However, there is at least one environment that claims to be C99 but does not
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support these modifiers. If --disable-percent-zt is specified, no use is made
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of the z or t modifiers. Instead or %td or %zu, %lu is used, with a cast for
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size_t values.
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. There is a special option called --enable-fuzz-support for use by people who
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want to run fuzzing tests on PCRE2. At present this applies only to the 8-bit
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@ -888,4 +897,4 @@ The distribution should contain the files listed below.
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Philip Hazel
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Email local part: ph10
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Email domain: cam.ac.uk
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Last updated: 19 September 2018
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Last updated: 15 November 2018
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@ -18,6 +18,7 @@
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#cmakedefine SUPPORT_PCRE2_16 1
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#cmakedefine SUPPORT_PCRE2_32 1
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#cmakedefine PCRE2_DEBUG 1
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#cmakedefine DISABLE_PERCENT_ZT 1
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#cmakedefine SUPPORT_LIBBZ2 1
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#cmakedefine SUPPORT_LIBEDIT 1
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17
configure.ac
17
configure.ac
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@ -131,7 +131,7 @@ AC_ARG_ENABLE(pcre2-32,
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, enable_pcre2_32=unset)
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AC_SUBST(enable_pcre2_32)
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# Handle --dnable-debug (disabled by default)
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# Handle --enable-debug (disabled by default)
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AC_ARG_ENABLE(debug,
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AS_HELP_STRING([--enable-debug],
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[enable debugging code]),
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@ -343,6 +343,12 @@ AC_ARG_ENABLE(stack-for-recursion,,
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# [don't use stack recursion when matching]),
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# , enable_stack_for_recursion=yes)
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# Handle --disable-percent_zt (set as "auto" by default)
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AC_ARG_ENABLE(percent-zt,
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AS_HELP_STRING([--disable-percent-zt],
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[disable the use of z and t formatting modifiers]),
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, enable_percent_zt=auto)
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# Set the default value for pcre2-8
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if test "x$enable_pcre2_8" = "xunset"
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then
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@ -587,6 +593,14 @@ if test "$enable_debug" = "yes"; then
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Define to any value to include debugging code.])
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fi
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if test "$enable_percent_zt" = "no"; then
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AC_DEFINE([DISABLE_PERCENT_ZT], [], [
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Define to any value to disable the use of the z and t modifiers in
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formatting settings such as %zu or %td (this is rarely needed).])
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else
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enable_percent_zt=auto
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fi
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# Unless running under Windows, JIT support requires pthreads.
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if test "$enable_jit" = "yes"; then
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@ -1033,6 +1047,7 @@ $PACKAGE-$VERSION configuration summary:
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Valgrind support ................... : ${enable_valgrind}
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Code coverage ...................... : ${enable_coverage}
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Fuzzer support ..................... : ${enable_fuzz_support}
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Use %zu and %td .................... : ${enable_percent_zt}
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EOF
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@ -374,6 +374,15 @@ library. They are also documented in the pcre2build man page.
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If you get error messages about missing functions tgetstr, tgetent, tputs,
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tgetflag, or tgoto, this is the problem, and linking with the ncurses library
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should fix it.
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. The C99 standard defines formatting modifiers z and t for size_t and
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ptrdiff_t values, respectively. By default, PCRE2 uses these modifiers in
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environments other than Microsoft Visual Studio when __STDC_VERSION__ is
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defined and has a value greater than or equal to 199901L (indicating C99).
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However, there is at least one environment that claims to be C99 but does not
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support these modifiers. If --disable-percent-zt is specified, no use is made
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of the z or t modifiers. Instead or %td or %zu, %lu is used, with a cast for
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size_t values.
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. There is a special option called --enable-fuzz-support for use by people who
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want to run fuzzing tests on PCRE2. At present this applies only to the 8-bit
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@ -888,4 +897,4 @@ The distribution should contain the files listed below.
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Philip Hazel
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Email local part: ph10
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Email domain: cam.ac.uk
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Last updated: 19 September 2018
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Last updated: 15 November 2018
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@ -33,11 +33,12 @@ please consult the man page, in case the conversion went wrong.
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<li><a name="TOC18" href="#SEC18">INCLUDING DEBUGGING CODE</a>
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<li><a name="TOC19" href="#SEC19">DEBUGGING WITH VALGRIND SUPPORT</a>
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<li><a name="TOC20" href="#SEC20">CODE COVERAGE REPORTING</a>
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<li><a name="TOC21" href="#SEC21">SUPPORT FOR FUZZERS</a>
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<li><a name="TOC22" href="#SEC22">OBSOLETE OPTION</a>
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<li><a name="TOC23" href="#SEC23">SEE ALSO</a>
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<li><a name="TOC24" href="#SEC24">AUTHOR</a>
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<li><a name="TOC25" href="#SEC25">REVISION</a>
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<li><a name="TOC21" href="#SEC21">DISABLING THE Z AND T FORMATTING MODIFIERS</a>
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<li><a name="TOC22" href="#SEC22">SUPPORT FOR FUZZERS</a>
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<li><a name="TOC23" href="#SEC23">OBSOLETE OPTION</a>
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<li><a name="TOC24" href="#SEC24">SEE ALSO</a>
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<li><a name="TOC25" href="#SEC25">AUTHOR</a>
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<li><a name="TOC26" href="#SEC26">REVISION</a>
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</ul>
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<br><a name="SEC1" href="#TOC1">BUILDING PCRE2</a><br>
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<P>
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@ -523,7 +524,21 @@ This cleans all coverage data including the generated coverage report. For more
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information about code coverage, see the <b>gcov</b> and <b>lcov</b>
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documentation.
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</P>
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<br><a name="SEC21" href="#TOC1">SUPPORT FOR FUZZERS</a><br>
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<br><a name="SEC21" href="#TOC1">DISABLING THE Z AND T FORMATTING MODIFIERS</a><br>
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<P>
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The C99 standard defines formatting modifiers z and t for size_t and
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ptrdiff_t values, respectively. By default, PCRE2 uses these modifiers in
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environments other than Microsoft Visual Studio when __STDC_VERSION__ is
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defined and has a value greater than or equal to 199901L (indicating C99).
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However, there is at least one environment that claims to be C99 but does not
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support these modifiers. If
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<pre>
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--disable-percent-zt
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</pre>
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is specified, no use is made of the z or t modifiers. Instead or %td or %zu,
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%lu is used, with a cast for size_t values.
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</P>
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<br><a name="SEC22" href="#TOC1">SUPPORT FOR FUZZERS</a><br>
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<P>
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There is a special option for use by people who want to run fuzzing tests on
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PCRE2:
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@ -547,7 +562,7 @@ arguments: if an argument starts with "=" the rest of it is a literal input
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string. Otherwise, it is assumed to be a file name, and the contents of the
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file are the test string.
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</P>
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<br><a name="SEC22" href="#TOC1">OBSOLETE OPTION</a><br>
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<br><a name="SEC23" href="#TOC1">OBSOLETE OPTION</a><br>
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<P>
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In versions of PCRE2 prior to 10.30, there were two ways of handling
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backtracking in the <b>pcre2_match()</b> function. The default was to use the
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@ -559,11 +574,11 @@ was set, memory on the heap was used. From release 10.30 onwards this has
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changed (the stack is no longer used) and this option now does nothing except
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give a warning.
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</P>
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<br><a name="SEC23" href="#TOC1">SEE ALSO</a><br>
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<br><a name="SEC24" href="#TOC1">SEE ALSO</a><br>
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<P>
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<b>pcre2api</b>(3), <b>pcre2-config</b>(3).
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</P>
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<br><a name="SEC24" href="#TOC1">AUTHOR</a><br>
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<br><a name="SEC25" href="#TOC1">AUTHOR</a><br>
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<P>
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Philip Hazel
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<br>
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@ -572,9 +587,9 @@ University Computing Service
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Cambridge, England.
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<br>
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</P>
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<br><a name="SEC25" href="#TOC1">REVISION</a><br>
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<br><a name="SEC26" href="#TOC1">REVISION</a><br>
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<P>
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Last updated: 26 April 2018
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Last updated: 15 November 2018
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<br>
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Copyright © 1997-2018 University of Cambridge.
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<br>
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@ -4158,6 +4158,21 @@ CODE COVERAGE REPORTING
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mentation.
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DISABLING THE Z AND T FORMATTING MODIFIERS
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The C99 standard defines formatting modifiers z and t for size_t and
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ptrdiff_t values, respectively. By default, PCRE2 uses these modifiers
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in environments other than Microsoft Visual Studio when __STDC_VER-
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SION__ is defined and has a value greater than or equal to 199901L
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(indicating C99). However, there is at least one environment that
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claims to be C99 but does not support these modifiers. If
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--disable-percent-zt
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is specified, no use is made of the z or t modifiers. Instead or %td or
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%zu, %lu is used, with a cast for size_t values.
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SUPPORT FOR FUZZERS
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There is a special option for use by people who want to run fuzzing
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@ -4210,7 +4225,7 @@ AUTHOR
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REVISION
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Last updated: 26 April 2018
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Last updated: 15 November 2018
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Copyright (c) 1997-2018 University of Cambridge.
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------------------------------------------------------------------------------
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@ -1,4 +1,4 @@
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.TH PCRE2BUILD 3 "26 April 2018" "PCRE2 10.32"
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.TH PCRE2BUILD 3 "15 November 2018" "PCRE2 10.33"
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.SH NAME
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PCRE2 - Perl-compatible regular expressions (revised API)
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.
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@ -533,6 +533,22 @@ information about code coverage, see the \fBgcov\fP and \fBlcov\fP
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documentation.
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.
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.
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.SH "DISABLING THE Z AND T FORMATTING MODIFIERS"
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.rs
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.sp
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The C99 standard defines formatting modifiers z and t for size_t and
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ptrdiff_t values, respectively. By default, PCRE2 uses these modifiers in
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environments other than Microsoft Visual Studio when __STDC_VERSION__ is
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defined and has a value greater than or equal to 199901L (indicating C99).
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However, there is at least one environment that claims to be C99 but does not
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support these modifiers. If
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.sp
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--disable-percent-zt
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.sp
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is specified, no use is made of the z or t modifiers. Instead or %td or %zu,
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%lu is used, with a cast for size_t values.
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.
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.
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.SH "SUPPORT FOR FUZZERS"
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.rs
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.sp
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@ -591,6 +607,6 @@ Cambridge, England.
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.rs
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.sp
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.nf
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Last updated: 26 April 2018
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Last updated: 15 November 2018
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Copyright (c) 1997-2018 University of Cambridge.
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.fi
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@ -35,6 +35,10 @@ sure both macros are undefined; an emulation function will then be used. */
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*/
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/* #undef BSR_ANYCRLF */
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/* Define to any value to disable the use of the z and t modifiers in
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formatting settings such as %zu or %td (this is rarely needed). */
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/* #undef DISABLE_PERCENT_ZT */
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/* If you are compiling for a system that uses EBCDIC instead of ASCII
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character codes, define this macro to any value. When EBCDIC is set, PCRE2
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assumes that all input strings are in EBCDIC. If you do not define this
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@ -35,6 +35,10 @@ sure both macros are undefined; an emulation function will then be used. */
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*/
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#undef BSR_ANYCRLF
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/* Define to any value to disable the use of the z and t modifiers in
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formatting settings such as %zu or %td (this is rarely needed). */
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#undef DISABLE_PERCENT_ZT
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/* If you are compiling for a system that uses EBCDIC instead of ASCII
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character codes, define this macro to any value. When EBCDIC is set, PCRE2
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assumes that all input strings are in EBCDIC. If you do not define this
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@ -169,9 +169,10 @@ commented out the original, but kept it around just in case. */
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/* void vms_setsymbol( char *, char *, int ); Original code from [1]. */
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#endif
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/* VC and older compilers don't support %td or %zu. */
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/* VC and older compilers don't support %td or %zu, and even some that claim to
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be C99 don't support it (hence DISABLE_PERCENT_ZT). */
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#if defined(_MSC_VER) || !defined(__STDC_VERSION__) || __STDC_VERSION__ < 199901L
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#if defined(_MSC_VER) || !defined(__STDC_VERSION__) || __STDC_VERSION__ < 199901L || defined(DISABLE_PERCENT_ZT)
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#define PTR_FORM "lu"
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#define SIZ_FORM "lu"
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#define SIZ_CAST (unsigned long int)
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