How to solve "expected an expression" error?
I'm using Keil tools uVision V4.71.2.0. C compiler Armcc.Exe version V5.03.0.69.
I'm working on large code base.
The following is the error from the compiler:
Build target 'Proj1_Debug'
compiling RTX_Config.c...
C:\Keil\ARM\RV31\INC\RTX_l
Target not created
Line 185 in RTX_lib.c is as follows:
#if (__ARM__ && __RTA_RTX_CONFIG)
what might be the problem?
I'm working on large code base.
The following is the error from the compiler:
Build target 'Proj1_Debug'
compiling RTX_Config.c...
C:\Keil\ARM\RV31\INC\RTX_l
Target not created
Line 185 in RTX_lib.c is as follows:
#if (__ARM__ && __RTA_RTX_CONFIG)
what might be the problem?
mccarl
Can you post some of the code either side of that line too?
ASKER
I think I found the problem.
Filename RTX_lib.c has the #if condition as follows:
#if (__ARM__ && __RTA_RTX_CONFIG) // error is "expected an expression"
Filename RTX_Config.c has the following definition:
#define __RTA_RTX_CONFIG
Now, this error makes sense. Since __RTA_RTX_CONFIG is empty, there is no expression.
But I cannot understand how RTX_lib.c knows about __RTA_RTX_CONFIG because it's defined
in a different .c file?
I'm new to some large code base which uses Keil Development Tool based on ARM 7 Processor.
Filename RTX_lib.c has the #if condition as follows:
#if (__ARM__ && __RTA_RTX_CONFIG) // error is "expected an expression"
Filename RTX_Config.c has the following definition:
#define __RTA_RTX_CONFIG
Now, this error makes sense. Since __RTA_RTX_CONFIG is empty, there is no expression.
But I cannot understand how RTX_lib.c knows about __RTA_RTX_CONFIG because it's defined
in a different .c file?
I'm new to some large code base which uses Keil Development Tool based on ARM 7 Processor.
ASKER CERTIFIED SOLUTION
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ASKER
The file compiles now and I can build my target. What I don't understand is how does RTX_lib.c knows the value of __RTA_RTX_CONFIG macro. This macro is defined in a different C file.
I'm using Keil uVision V4.71.2.0 operating system. It seems like lot of things are happening behind scenes. RTX_lib.c is Keil's operating system file. This operating system is in my hard drive.
I'm using Keil uVision V4.71.2.0 operating system. It seems like lot of things are happening behind scenes. RTX_lib.c is Keil's operating system file. This operating system is in my hard drive.
such macros also can be passed from outside to the compiler either by command (normally with -D<macro>) or by makefile/projectfile option. some macros also may be set by the compiler, for example macros specifying the operation system and version numbers.
Sara
Sara