MSVC: Rebuild spiexceptions.h when out of date.

Also, add a warning to catch future instances of naming a nonexistent
file as a prerequisite.  Back-patch to 9.3 (all supported versions).

diff --git a/src/tools/msvc/Solution.pm b/src/tools/msvc/Solution.pm
index c5e78ec754a765ab03723c51bf8892beb7da192b..bceddfcb962df38a414321b8ffaa6cc319b5b1b9 100644 (file)
--- a/src/tools/msvc/Solution.pm
+++ b/src/tools/msvc/Solution.pm
@@ -90,6 +90,7 @@ sub DeterminePlatform
 sub IsNewer
 {
        my ($newfile, $oldfile) = @_;
+       -e $oldfile or warn "source file \"$oldfile\" does not exist";
        if (   $oldfile ne 'src\tools\msvc\config.pl'
                && $oldfile ne 'src\tools\msvc\config_default.pl')
        {
@@ -311,7 +312,7 @@ s{PG_VERSION_STR "[^"]+"}{__STRINGIFY(x) #x\n#define __STRINGIFY2(z) __STRINGIFY
        if ($self->{options}->{python}
                && IsNewer(
                        'src\pl\plpython\spiexceptions.h',
-                       'src\include\backend\errcodes.txt'))
+                       'src\backend\utils\errcodes.txt'))
        {
                print "Generating spiexceptions.h...\n";
                system(