Build libc using links rather than referencing the C files in src dir…

…ectly.

The C library builds with different options which should not be reused for the C binary or vice versa.

doc/xml/release.xml

@@ -23,6 +23,12 @@
                         <p>Use <code>time_t</code> instead of <code>__time_t</code> for better portability.</p>
                     </release-item>
                 </release-improvement-list>
+
+                <release-development-list>
+                    <release-item>
+                        <p>Build <path>libc</path> using links rather than referencing the C files in <path>src</path> directly.  The C library builds with different options which should not be reused for the C binary or vice versa.</p>
+                    </release-item>
+                </release-development-list>
             </release-core-list>
 
             <release-test-list>

libc/Makefile.PL

@@ -13,7 +13,6 @@ $SIG{__DIE__} = sub { Carp::confess @_ };
 use Cwd qw(abs_path);
 use ExtUtils::MakeMaker;
 use File::Basename qw(dirname);
-use File::Copy qw(copy);
 
 use lib dirname($0) . '/lib';
 use pgBackRest::LibCAuto;
@@ -112,10 +111,28 @@ my @stryCFile =
     'storage/storage.c',
 );
 
-# Add ../src for files that are outside libc
+# Link source files to build the C library.  The library has different build options and we don't want the bin build to reuse any of
+# them.  Also, this makes the output of the __FILE__ macro prettier.
 for (my $iFileIdx = 1; $iFileIdx < @stryCFile; $iFileIdx++)
 {
-    $stryCFile[$iFileIdx] = '../src/' . $stryCFile[$iFileIdx];
+    # Make directory
+    system("mkdir -p " . dirname($stryCFile[$iFileIdx])) == 0
+        or die('unable to mkdir ' . dirname($stryCFile[$iFileIdx]));
+
+    # Link the file to the source directory
+    my @stryLink = split('/', $stryCFile[$iFileIdx]);
+    my $strLink;
+
+    for (my $iLinkIdx = 0; $iLinkIdx < @stryLink; $iLinkIdx++)
+    {
+        $strLink .= (defined($strLink) ? '/' : '') . '..';
+    }
+
+    if (!-l $stryCFile[$iFileIdx])
+    {
+        system("ln -s ${strLink}/src/$stryCFile[$iFileIdx] $stryCFile[$iFileIdx]") == 0
+            or die("unable to link ../src/$stryCFile[$iFileIdx] to $stryCFile[$iFileIdx]");
+    }
 }
 
 # Write the makefile

src/config/config.c

@@ -69,7 +69,7 @@ typedef struct ConfigOptionData
 /***********************************************************************************************************************************
 Include the automatically generated configuration data
 ***********************************************************************************************************************************/
-#include "config.auto.c"
+#include "config/config.auto.c"
 
 /***********************************************************************************************************************************
 Debug Asserts

src/config/define.c

@@ -170,7 +170,7 @@ typedef enum
 /***********************************************************************************************************************************
 Include the automatically generated configuration data.
 ***********************************************************************************************************************************/
-#include "define.auto.c"
+#include "config/define.auto.c"
 
 /***********************************************************************************************************************************
 Find optional data for a command and option.

src/config/parse.c

@@ -47,7 +47,7 @@ Parse option flags
 /***********************************************************************************************************************************
 Include automatically generated data structure for getopt_long()
 ***********************************************************************************************************************************/
-#include "parse.auto.c"
+#include "config/parse.auto.c"
 
 /***********************************************************************************************************************************
 Struct to hold options parsed from the command line