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<td class='lines'><pre><code>dnl GNOME_COMPILE_WARNINGS
dnl Turn on many useful compiler warnings
dnl For now<span style="color:#3a3935">,</span> only works on GCC
AC_DEFUN<span style="color:#3a3935">([</span>GNOME_COMPILE_WARNINGS<span style="color:#3a3935">],[</span>
  AC_ARG_ENABLE<span style="color:#3a3935">(</span>compile<span style="color:#2e8b57">-warnings</span><span style="color:#3a3935">,</span> 
    <span style="color:#3a3935">[</span>  <span style="color:#2e8b57">--enable-compile-warnings</span><span style="color:#3a3935">=[</span>no<span style="color:#3a3935">/</span>minimum<span style="color:#3a3935">/</span><span style="color:#572e8c">yes</span><span style="color:#3a3935">]</span>   Turn on compiler warnings.<span style="color:#3a3935">],,</span>enable_compile_warnings<span style="color:#3a3935">=</span>minimum<span style="color:#3a3935">)</span>

  AC_MSG_CHECKING<span style="color:#3a3935">(</span>what warning flags to pass to the C compiler<span style="color:#3a3935">)</span>
  warnCFLAGS<span style="color:#3a3935">=</span>
  <span style="color:#a52a35">if</span> <span style="color:#2e8b57">test</span> <span style="color:#ff00ff">&quot;x</span><span style="color:#ff00ff">$GCC</span><span style="color:#ff00ff">&quot;</span> <span style="color:#3a3935">!=</span> xyes<span style="color:#3a3935">;</span> <span style="color:#a52a35">then</span>
    enable_compile_warnings<span style="color:#3a3935">=</span>no
  <span style="color:#a52a35">fi</span>

  <span style="color:#a52a35">if</span> <span style="color:#2e8b57">test</span> <span style="color:#ff00ff">&quot;x</span><span style="color:#ff00ff">$enable_compile_warnings</span><span style="color:#ff00ff">&quot;</span> <span style="color:#3a3935">!=</span> <span style="color:#ff00ff">&quot;xno&quot;</span><span style="color:#3a3935">;</span> <span style="color:#a52a35">then</span>
    <span style="color:#a52a35">if</span> <span style="color:#2e8b57">test</span> <span style="color:#ff00ff">&quot;x</span><span style="color:#ff00ff">$GCC</span><span style="color:#ff00ff">&quot;</span> <span style="color:#3a3935">=</span> <span style="color:#ff00ff">&quot;xyes&quot;</span><span style="color:#3a3935">;</span> <span style="color:#a52a35">then</span>
      <span style="color:#a52a35">case</span> <span style="color:#ff00ff">&quot;</span> <span style="color:#ff00ff">$CFLAGS</span> <span style="color:#ff00ff">&quot;</span> <span style="color:#a52a35">in</span>
      <span style="color:#3a3935">*[\ \ ]-Wall[\ \  ]*) ;;</span>
      <span style="color:#3a3935">*)</span> warnCFLAGS<span style="color:#3a3935">=</span><span style="color:#ff00ff">&quot;-Wall -Wunused&quot;</span> <span style="color:#3a3935">;;</span>
      <span style="color:#a52a35">esac</span>

      <span style="color:#003cff">## -W is not all that useful.  And it cannot be controlled</span>
      <span style="color:#003cff">## with individual -Wno-xxx flags, unlike -Wall</span>
      <span style="color:#a52a35">if</span> <span style="color:#2e8b57">test</span> <span style="color:#ff00ff">&quot;x</span><span style="color:#ff00ff">$enable_compile_warnings</span><span style="color:#ff00ff">&quot;</span> <span style="color:#3a3935">=</span> <span style="color:#ff00ff">&quot;xyes&quot;</span><span style="color:#3a3935">;</span> <span style="color:#a52a35">then</span>
    warnCFLAGS<span style="color:#3a3935">=</span><span style="color:#ff00ff">&quot;</span><span style="color:#ff00ff">$warnCFLAGS</span> <span style="color:#ff00ff">-Wmissing-prototypes -Wmissing-declarations&quot;</span>
      <span style="color:#a52a35">fi</span>
    <span style="color:#a52a35">fi</span>
  <span style="color:#a52a35">fi</span>
  AC_MSG_RESULT<span style="color:#3a3935">(</span><span style="color:#3a3935; font-weight:bold">$warnCFLAGS</span><span style="color:#3a3935">)</span>

  AC_ARG_ENABLE<span style="color:#3a3935">(</span>iso<span style="color:#2e8b57">-c</span><span style="color:#3a3935">,</span>
    <span style="color:#3a3935">[</span>  <span style="color:#2e8b57">--enable-iso-c</span>          Try to warn <span style="color:#a52a35">if</span> code is not ISO C <span style="color:#3a3935">],,</span>
    enable_iso_c<span style="color:#3a3935">=</span>no<span style="color:#3a3935">)</span>

  AC_MSG_CHECKING<span style="color:#3a3935">(</span>what language compliance flags to pass to the C compiler<span style="color:#3a3935">)</span>
  complCFLAGS<span style="color:#3a3935">=</span>
  <span style="color:#a52a35">if</span> <span style="color:#2e8b57">test</span> <span style="color:#ff00ff">&quot;x</span><span style="color:#ff00ff">$enable_iso_c</span><span style="color:#ff00ff">&quot;</span> <span style="color:#3a3935">!=</span> <span style="color:#ff00ff">&quot;xno&quot;</span><span style="color:#3a3935">;</span> <span style="color:#a52a35">then</span>
    <span style="color:#a52a35">if</span> <span style="color:#2e8b57">test</span> <span style="color:#ff00ff">&quot;x</span><span style="color:#ff00ff">$GCC</span><span style="color:#ff00ff">&quot;</span> <span style="color:#3a3935">=</span> <span style="color:#ff00ff">&quot;xyes&quot;</span><span style="color:#3a3935">;</span> <span style="color:#a52a35">then</span>
      <span style="color:#a52a35">case</span> <span style="color:#ff00ff">&quot;</span> <span style="color:#ff00ff">$CFLAGS</span> <span style="color:#ff00ff">&quot;</span> <span style="color:#a52a35">in</span>
      <span style="color:#3a3935">*[\ \ ]-ansi[\ \  ]*) ;;</span>
      <span style="color:#3a3935">*)</span> complCFLAGS<span style="color:#3a3935">=</span><span style="color:#ff00ff">&quot;</span><span style="color:#ff00ff">$complCFLAGS</span> <span style="color:#ff00ff">-ansi&quot;</span> <span style="color:#3a3935">;;</span>
      <span style="color:#a52a35">esac</span>

      <span style="color:#a52a35">case</span> <span style="color:#ff00ff">&quot;</span> <span style="color:#ff00ff">$CFLAGS</span> <span style="color:#ff00ff">&quot;</span> <span style="color:#a52a35">in</span>
      <span style="color:#3a3935">*[\ \ ]-pedantic[\ \  ]*) ;;</span>
      <span style="color:#3a3935">*)</span> complCFLAGS<span style="color:#3a3935">=</span><span style="color:#ff00ff">&quot;</span><span style="color:#ff00ff">$complCFLAGS</span> <span style="color:#ff00ff">-pedantic&quot;</span> <span style="color:#3a3935">;;</span>
      <span style="color:#a52a35">esac</span>
    <span style="color:#a52a35">fi</span>
  <span style="color:#a52a35">fi</span>
  AC_MSG_RESULT<span style="color:#3a3935">(</span><span style="color:#3a3935; font-weight:bold">$complCFLAGS</span><span style="color:#3a3935">)</span>
  <span style="color:#a52a35">if</span> <span style="color:#2e8b57">test</span> <span style="color:#ff00ff">&quot;x</span><span style="color:#ff00ff">$cflags_set</span><span style="color:#ff00ff">&quot;</span> <span style="color:#3a3935">!=</span> <span style="color:#ff00ff">&quot;xyes&quot;</span><span style="color:#3a3935">;</span> <span style="color:#a52a35">then</span>
    CFLAGS<span style="color:#3a3935">=</span><span style="color:#ff00ff">&quot;</span><span style="color:#ff00ff">$CFLAGS</span> <span style="color:#ff00ff"></span><span style="color:#ff00ff">$warnCFLAGS</span> <span style="color:#ff00ff"></span><span style="color:#ff00ff">$complCFLAGS</span><span style="color:#ff00ff">&quot;</span>
    cflags_set<span style="color:#3a3935">=</span><span style="color:#572e8c">yes</span>
    AC_SUBST<span style="color:#3a3935">(</span>cflags_set<span style="color:#3a3935">)</span>
  <span style="color:#a52a35">fi</span>
<span style="color:#3a3935">])</span>

dnl For C<span style="color:#3a3935">++,</span> <span style="color:#a52a35">do</span> basically the same thing.

AC_DEFUN<span style="color:#3a3935">([</span>GNOME_CXX_WARNINGS<span style="color:#3a3935">],[</span>
  AC_ARG_ENABLE<span style="color:#3a3935">(</span>cxx<span style="color:#2e8b57">-warnings</span><span style="color:#3a3935">,</span> 
    <span style="color:#3a3935">[</span>  <span style="color:#2e8b57">--enable-cxx-warnings</span><span style="color:#3a3935">=[</span>no<span style="color:#3a3935">/</span>minimum<span style="color:#3a3935">/</span><span style="color:#572e8c">yes</span><span style="color:#3a3935">]</span>   Turn on compiler warnings.<span style="color:#3a3935">],,</span>enable_cxx_warnings<span style="color:#3a3935">=</span>minimum<span style="color:#3a3935">)</span>

  AC_MSG_CHECKING<span style="color:#3a3935">(</span>what warning flags to pass to the C<span style="color:#3a3935">++</span> compiler<span style="color:#3a3935">)</span>
  warnCXXFLAGS<span style="color:#3a3935">=</span>
  <span style="color:#a52a35">if</span> <span style="color:#2e8b57">test</span> <span style="color:#ff00ff">&quot;x</span><span style="color:#ff00ff">$GCC</span><span style="color:#ff00ff">&quot;</span> <span style="color:#3a3935">!=</span> xyes<span style="color:#3a3935">;</span> <span style="color:#a52a35">then</span>
    enable_compile_warnings<span style="color:#3a3935">=</span>no
  <span style="color:#a52a35">fi</span>
  <span style="color:#a52a35">if</span> <span style="color:#2e8b57">test</span> <span style="color:#ff00ff">&quot;x</span><span style="color:#ff00ff">$enable_cxx_warnings</span><span style="color:#ff00ff">&quot;</span> <span style="color:#3a3935">!=</span> <span style="color:#ff00ff">&quot;xno&quot;</span><span style="color:#3a3935">;</span> <span style="color:#a52a35">then</span>
    <span style="color:#a52a35">if</span> <span style="color:#2e8b57">test</span> <span style="color:#ff00ff">&quot;x</span><span style="color:#ff00ff">$GCC</span><span style="color:#ff00ff">&quot;</span> <span style="color:#3a3935">=</span> <span style="color:#ff00ff">&quot;xyes&quot;</span><span style="color:#3a3935">;</span> <span style="color:#a52a35">then</span>
      <span style="color:#a52a35">case</span> <span style="color:#ff00ff">&quot;</span> <span style="color:#ff00ff">$CXXFLAGS</span> <span style="color:#ff00ff">&quot;</span> <span style="color:#a52a35">in</span>
      <span style="color:#3a3935">*[\ \ ]-Wall[\ \  ]*) ;;</span>
      <span style="color:#3a3935">*)</span> warnCXXFLAGS<span style="color:#3a3935">=</span><span style="color:#ff00ff">&quot;-Wall -Wno-unused&quot;</span> <span style="color:#3a3935">;;</span>
      <span style="color:#a52a35">esac</span>

      <span style="color:#003cff">## -W is not all that useful.  And it cannot be controlled</span>
      <span style="color:#003cff">## with individual -Wno-xxx flags, unlike -Wall</span>
      <span style="color:#a52a35">if</span> <span style="color:#2e8b57">test</span> <span style="color:#ff00ff">&quot;x</span><span style="color:#ff00ff">$enable_cxx_warnings</span><span style="color:#ff00ff">&quot;</span> <span style="color:#3a3935">=</span> <span style="color:#ff00ff">&quot;xyes&quot;</span><span style="color:#3a3935">;</span> <span style="color:#a52a35">then</span>
    warnCXXFLAGS<span style="color:#3a3935">=</span><span style="color:#ff00ff">&quot;</span><span style="color:#ff00ff">$warnCXXFLAGS</span> <span style="color:#ff00ff">-Wmissing-prototypes -Wmissing-declarations -Wshadow -Woverloaded-virtual&quot;</span>
      <span style="color:#a52a35">fi</span>
    <span style="color:#a52a35">fi</span>
  <span style="color:#a52a35">fi</span>
  AC_MSG_RESULT<span style="color:#3a3935">(</span><span style="color:#3a3935; font-weight:bold">$warnCXXFLAGS</span><span style="color:#3a3935">)</span>

   AC_ARG_ENABLE<span style="color:#3a3935">(</span>iso<span style="color:#2e8b57">-cxx</span><span style="color:#3a3935">,</span>
     <span style="color:#3a3935">[</span>  <span style="color:#2e8b57">--enable-iso-cxx</span>          Try to warn <span style="color:#a52a35">if</span> code is not ISO C<span style="color:#3a3935">++ ],,</span>
     enable_iso_cxx<span style="color:#3a3935">=</span>no<span style="color:#3a3935">)</span>

   AC_MSG_CHECKING<span style="color:#3a3935">(</span>what language compliance flags to pass to the C<span style="color:#3a3935">++</span> compiler<span style="color:#3a3935">)</span>
   complCXXFLAGS<span style="color:#3a3935">=</span>
   <span style="color:#a52a35">if</span> <span style="color:#2e8b57">test</span> <span style="color:#ff00ff">&quot;x</span><span style="color:#ff00ff">$enable_iso_cxx</span><span style="color:#ff00ff">&quot;</span> <span style="color:#3a3935">!=</span> <span style="color:#ff00ff">&quot;xno&quot;</span><span style="color:#3a3935">;</span> <span style="color:#a52a35">then</span>
     <span style="color:#a52a35">if</span> <span style="color:#2e8b57">test</span> <span style="color:#ff00ff">&quot;x</span><span style="color:#ff00ff">$GCC</span><span style="color:#ff00ff">&quot;</span> <span style="color:#3a3935">=</span> <span style="color:#ff00ff">&quot;xyes&quot;</span><span style="color:#3a3935">;</span> <span style="color:#a52a35">then</span>
      <span style="color:#a52a35">case</span> <span style="color:#ff00ff">&quot;</span> <span style="color:#ff00ff">$CXXFLAGS</span> <span style="color:#ff00ff">&quot;</span> <span style="color:#a52a35">in</span>
      <span style="color:#3a3935">*[\ \ ]-ansi[\ \  ]*) ;;</span>
      <span style="color:#3a3935">*)</span> complCXXFLAGS<span style="color:#3a3935">=</span><span style="color:#ff00ff">&quot;</span><span style="color:#ff00ff">$complCXXFLAGS</span> <span style="color:#ff00ff">-ansi&quot;</span> <span style="color:#3a3935">;;</span>
      <span style="color:#a52a35">esac</span>

      <span style="color:#a52a35">case</span> <span style="color:#ff00ff">&quot;</span> <span style="color:#ff00ff">$CXXFLAGS</span> <span style="color:#ff00ff">&quot;</span> <span style="color:#a52a35">in</span>
      <span style="color:#3a3935">*[\ \ ]-pedantic[\ \  ]*) ;;</span>
      <span style="color:#3a3935">*)</span> complCXXFLAGS<span style="color:#3a3935">=</span><span style="color:#ff00ff">&quot;</span><span style="color:#ff00ff">$complCXXFLAGS</span> <span style="color:#ff00ff">-pedantic&quot;</span> <span style="color:#3a3935">;;</span>
      <span style="color:#a52a35">esac</span>
     <span style="color:#a52a35">fi</span>
   <span style="color:#a52a35">fi</span>
  AC_MSG_RESULT<span style="color:#3a3935">(</span><span style="color:#3a3935; font-weight:bold">$complCXXFLAGS</span><span style="color:#3a3935">)</span>
  <span style="color:#a52a35">if</span> <span style="color:#2e8b57">test</span> <span style="color:#ff00ff">&quot;x</span><span style="color:#ff00ff">$cxxflags_set</span><span style="color:#ff00ff">&quot;</span> <span style="color:#3a3935">!=</span> <span style="color:#ff00ff">&quot;xyes&quot;</span><span style="color:#3a3935">;</span> <span style="color:#a52a35">then</span>
    CXXFLAGS<span style="color:#3a3935">=</span><span style="color:#ff00ff">&quot;</span><span style="color:#ff00ff">$CXXFLAGS</span> <span style="color:#ff00ff"></span><span style="color:#ff00ff">$warnCXXFLAGS</span> <span style="color:#ff00ff"></span><span style="color:#ff00ff">$complCXXFLAGS</span><span style="color:#ff00ff">&quot;</span>
    cxxflags_set<span style="color:#3a3935">=</span><span style="color:#572e8c">yes</span>
    AC_SUBST<span style="color:#3a3935">(</span>cxxflags_set<span style="color:#3a3935">)</span>
  <span style="color:#a52a35">fi</span>
<span style="color:#3a3935">])</span>
</code></pre></td></tr></table>
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