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    <p>Chris,</p>
    <p>Thank you for responding to my post. I uninstalled and then
      reinstalled CommandLineTools per your suggestion. I'm still
      getting the same error. It appears that gcc is not seeing any of
      the CommandLineTools directories. When I ran the command <br>
    </p>
    <div dir="ltr">find /Library/Developer/CommandLineTools/ -name
      _stdio.h</div>
    <div dir="ltr"><br>
    </div>
    <div dir="ltr">I got:</div>
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    <div dir="ltr">(base) user@Mac-Pro ~ % find
      /Library/Developer/CommandLineTools/ -name _stdio.h <br>
/Library/Developer/CommandLineTools//SDKs/MacOSX11.1.sdk/usr/include/_stdio.h<br>
/Library/Developer/CommandLineTools//SDKs/MacOSX11.1.sdk/usr/include/xlocale/_stdio.h<br>
/Library/Developer/CommandLineTools//SDKs/MacOSX11.1.sdk/usr/include/secure/_stdio.h<br>
/Library/Developer/CommandLineTools//SDKs/MacOSX10.15.sdk/usr/include/_stdio.h<br>
/Library/Developer/CommandLineTools//SDKs/MacOSX10.15.sdk/usr/include/xlocale/_stdio.h<br>
/Library/Developer/CommandLineTools//SDKs/MacOSX10.15.sdk/usr/include/secure/_stdio.h</div>
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    <div dir="ltr">Any suggestions?</div>
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    <div dir="ltr">Sam Dupree.</div>
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      <br>
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    <div class="moz-cite-prefix">On January/12/2021 05:11:50,
      Christopher Albert wrote:<br>
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    <blockquote type="cite"
cite="mid:CACrYDbEJgD8YAPwuKtv-B9d3o7Si3TXuBk5ux14wUurV8z452Q@mail.gmail.com">
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            <div dir="ltr">Hi Sam,<br>
              <br>
              looks like the XCode command line tools containing
              standard headers are either not installed or updated. Try
              xcode-select --install or manually download them from <a
                href="https://developer.apple.com/download/more/"
                moz-do-not-send="true">https://developer.apple.com/download/more/</a>
              and maybe uninstall/reinstall them in case updates don't
              work. Check with </div>
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            </div>
            <div dir="ltr">find /Library/Developer/CommandLineTools/
              -name _stdio.h</div>
            <div dir="ltr"><br>
            </div>
            <div>which should
give /Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk/usr/include/_stdio.h
              (besides possible older versions of MacOSX)</div>
            <div><br>
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            <div>Best,</div>
            <div><br>
            </div>
            <div>Chris</div>
            <div><br>
            </div>
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      <div class="gmail_quote">
        <div dir="ltr" class="gmail_attr">Am Sa., 9. Jan. 2021 um
          03:02 Uhr schrieb Samuel Dupree <<a
            href="mailto:sdupree@speakeasy.net" moz-do-not-send="true">sdupree@speakeasy.net</a>>:<br>
        </div>
        <blockquote class="gmail_quote" style="margin:0px 0px 0px
0.8ex;border-left-width:1px;border-left-style:solid;border-left-color:rgb(204,204,204);padding-left:1ex">I'm
          attempting to wrap a Fortran-77 source member library using
          f2py. <br>
          I'm running he Anaconda distribution for Python 3.7.6 on a Mac
          Pro <br>
          (2019) under Mac OS X Big Sur (ver. 11.1). The version of
          Xcode.app I'm <br>
          running is 12.3. The version of NumPy I'm running is 1.18.3.<br>
          <br>
          The errors I'm getting are from header files the compiler
          can't find as <br>
          captured in the attached log file. A sample of the kind of
          errors I'm <br>
          seeing are captured below.<br>
          <br>
          compile options: <br>
'-I/var/folders/2r/4bw6nw0x58z0_ybx632_h14m0000gq/T/tmp5uemdb2k/src.macosx-10.9-x86_64-3.7
          <br>
-I/Users/user/opt/anaconda3/lib/python3.7/site-packages/numpy/core/include
          <br>
          -I/Users/user/opt/anaconda3/include/python3.7m -c'<br>
          gcc: <br>
/var/folders/2r/4bw6nw0x58z0_ybx632_h14m0000gq/T/tmp5uemdb2k/src.macosx-10.9-x86_64-3.7/sofapymodule.c<br>
          gcc: <br>
/var/folders/2r/4bw6nw0x58z0_ybx632_h14m0000gq/T/tmp5uemdb2k/src.macosx-10.9-x86_64-3.7/fortranobject.c<br>
          In file included from <br>
/opt/local/lib/gcc10/gcc/x86_64-apple-darwin20/10.2.0/include-fixed/syslimits.h:7,<br>
                            from <br>
/opt/local/lib/gcc10/gcc/x86_64-apple-darwin20/10.2.0/include-fixed/limits.h:34,<br>
                            from <br>
          /Users/user/opt/anaconda3/include/python3.7m/Python.h:11,<br>
                            from <br>
/var/folders/2r/4bw6nw0x58z0_ybx632_h14m0000gq/T/tmp5uemdb2k/src.macosx-10.9-x86_64-3.7/sofapymodule.c:14:<br>
/opt/local/lib/gcc10/gcc/x86_64-apple-darwin20/10.2.0/include-fixed/limits.h:195:61:
          <br>
          error: no include path in which to search for limits.h<br>
             195 | #include_next <limits.h>  /* recurse down to
          the real one */<br>
          |                                                            
          ^<br>
          In file included from <br>
          /Users/user/opt/anaconda3/include/python3.7m/Python.h:25,<br>
                            from <br>
/var/folders/2r/4bw6nw0x58z0_ybx632_h14m0000gq/T/tmp5uemdb2k/src.macosx-10.9-x86_64-3.7/sofapymodule.c:14:<br>
/opt/local/lib/gcc10/gcc/x86_64-apple-darwin20/10.2.0/include-fixed/stdio.h:78:10:
          <br>
          fatal error: _stdio.h: No such file or directory<br>
              78 | #include <_stdio.h><br>
                 |          ^~~~~~~~~~<br>
          compilation terminated.<br>
          <br>
          Any suggestions?<br>
          <br>
          Sam Dupree.<br>
          <br>
          <br>
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