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doctech
Joined: 24 Nov 2011
Posts: 2
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| #warning preprocessor |
 Posted: Thu Nov 24, 2011 9:29 pm |
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Hi, Why do I get a 'Invalid pre-processor directive' message when I try to compile this?:
| Code: |
#define BOOT_COMPILE // comment out for normal compile
#ifdef BOOT_COMPILE
#warning COMPILING AS BOOTLOADER
#else
#include <bootloader.c>
#endif
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The #warning text turns blue in MPLAB so I would have thought that means it is recognized? I've tried lots of combinations of case/quotes/brackets etc.
thanks |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Thu Nov 24, 2011 10:08 pm |
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Are you using the CCS compiler ? If I compile the test program shown
below with vs. 4.127, and I enable warnings in the MPLAB Project / Build
Options, I get this output. It's working:
| Quote: |
Executing: "C:\Program Files\PICC\Ccsc.exe" "PCH_Test.c" +FH +DF +LN -T -A +M -Z +Y=9 +EA
>>> Warning 224 "PCH_Test.c" Line 9(12,38): #warning COMPILING AS BOOTLOADER
>>> Warning 203 "PCH_Test.c" Line 20(1,1): Condition always TRUE
Memory usage: ROM=0% RAM=0% - 0%
0 Errors, 2 Warnings.
Loaded C:\Program Files\PICC\Projects\PCH_Test\PCH_Test.cof.
BUILD SUCCEEDED: Thu Nov 24 20:05:09 2011
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If it doesn't work for you, then post your compiler version and post a
very short test program. ("short" means not much longer than the
following program).
| Code: |
#include <18F452.h>
#fuses XT, NOWDT, NOPROTECT, BROWNOUT, PUT, NOLVP
#use delay(clock=4M)
#use rs232(baud=9600, xmit=PIN_C6, rcv=PIN_C7, ERRORS)
#define BOOT_COMPILE // comment out for normal compile
#ifdef BOOT_COMPILE
#warning COMPILING AS BOOTLOADER
#else
#include <bootloader.c>
#endif
//====================================
void main()
{
while(1);
} |
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doctech
Joined: 24 Nov 2011
Posts: 2
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| Posted: Thu Nov 24, 2011 10:23 pm |
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We use an older version 4.032. I tried a new project using the code you posted and I still get the compile error. I also tried loading an example project in the CCS IDE and it doesn't like #warning either.
Starting to sound like a compiler bug to me but I can't see it mentioned in the list of fixes. (maybe they don't go back that far). |
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Ttelmah
Joined: 11 Mar 2010
Posts: 19496
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| Posted: Fri Nov 25, 2011 2:53 am |
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If you watched the forum at the time when you got that compiler, you would find it was really 'beta', with people telling you to use 3.249, rather than a V4 compiler. V4 only started to properly work around the late 4.06x version. Before this, very basic code might work, but probably in excess of 30% of things had problems....
I'm afraid 4.032, is likely to give you a lot more problems than this.
Best Wishes |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Fri Nov 25, 2011 3:10 pm |
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CCS added support for #warning in compiler vs. 4.069. You have
vs. 4.032 so it doesn't support it.
You are probably using the current CCS manual, but it's for a much later
version. Your version (4.032) was released on about April 19, 2007.
Probably you should use the August 2007 manual. It's the last manual
that doesn't have #warning documented in it. The next earlier manual is
dated January 2007:
| Quote: |
C Compiler Reference Manual Version 4 August 2007
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Here are two places you can still get the August 2007 manual. I found
these with Google:
http://www.bpcd.net/teacher/electrical/web/dspic/PCWReferenceManual.pdf
http://www.bairesrobotics.com.ar/data/ccs_picc_actualizado_2007.pdf |
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