stere projection produces wrong results on Win32 MSVC7

[warmerdam]

Using the supplied Makefile.vc, I did two builds for each version. The "release" build uses the OPTFLAGS settings as distributed in the source, while the "debug" build swaps the OPTFLAGS to use the second set of settings (which is commented out in the sources).

The command:

echo 105 40 | proj +proj=stere +lat_0=90 +lon_0=0 +lat_ts=70 +datum=WGS84

The Results:

Flavor 7 (debug): 5577808.93      1494569.40
Flavor 7 (release): 5610189.12      1503245.64
Flavor 8 (debug): 5577808.93      1494569.40
Flavor 8 (release): 5577808.93      1494569.40
Flavor 9 (debug): 5577808.93      1494569.40
Flavor 9 (release): 5577808.93      1494569.40

So, we can see this is a direct result of doing an optimized build with Flavor 7 (Visual Studio .Net 2003).

So, then I downloaded and installed Service Pack 1 ( http://www.microsoft.com/downloads/details.aspx?familyid=69d2219f-ce82-46a5-8aec-072bd4bb955e ) and rebuilt a "release" version. The results were the same.

Then, I added the "/Op" (Improve Float Consistency) flag and then the "release" results matched the "debug" results.

OPTFLAGS= /nologo /Ox /Op /MD

Eric G. Miller

[warmerdam]

I have modified nmake.opt to use /Op by default for optimized builds. I also updated nad/testvarious to include a small test of stere projection though this test script does not actually work on win32 since it depends on bash.