cannot link...says "?C_START" unresolved

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Read-Only Author Shishir Joshi Posted 27-Jun-2005 22:16 GMT Toolset C51	cannot link...says "?C_START" unresolved Shishir Joshi I am using c51 compiler and uv2. I wrote a small program for 89c51ed2. I included startup.a51 in the project but unable to build the project. It gives me a warning saying "unresolved external symbol C_START". I don't understand why this is happenning? Also when I change STARTUP.A51 to show xdata memory from 0000h to 06FFh, the map file generated shown "xdata end" at 0xFFFF. Is it OK?
Read-Only Author erik malund Posted 27-Jun-2005 22:24 GMT Toolset C51	RE: cannot link...says "?C_START" unresolved erik malund do you have a main() WITHOUT parametres? Erik
Read-Only Author Shishir Joshi Posted 27-Jun-2005 23:26 GMT Toolset C51	RE: cannot link...says "?C_START" unresolved Shishir Joshi yes i have the main module without any parameters.
Read-Only Author A.W. Neil Posted 28-Jun-2005 19:36 GMT Toolset C51	RE: cannot link...says "?C_START" unresolved A.W. Neil Are you using inline assembler, and/or have you enabled 'Generate Assembler SRC File'?
Read-Only Author Shishir Joshi Posted 28-Jun-2005 19:44 GMT Toolset C51	RE: cannot link...says "?C_START" unresolved Shishir Joshi Yes I have inline assembly and it never gave an error for the inline assembly I have. But "C_Start" is a call to the C start Off routine and should be found in any case. Am I right?
Read-Only Author Shishir Joshi Posted 28-Jun-2005 19:46 GMT Toolset C51	RE: cannot link...says "?C_START" unresolved Shishir Joshi I have generate assembler src enabled in the options.
Read-Only Author Hans-Bernhard Broeker Posted 28-Jun-2005 22:49 GMT Toolset C51	RE: cannot link...says "?C_START" unresolved Hans-Bernhard Broeker But "C_Start" is a call to the C start Off routine and should be found in any case. Am I right? Not if you compile all your sources via assembly. But since you should never have to do that, that's easy to fix. Just remove the global "compile to SRC" and "assemble SRC file" options, or invert them for at least one .c file --- it can even be an otherwise completely empty one. The Keil linkers don't automatically assume that all programs are C programs. They're being given a hint in the .obj files, by the C compiler, that the C runtime environment, including the C_Start function, is needed. But this hint cannot be expressed in Keil's Ax51 assembly language. That's why translating all C files to assembly, and compiling the generated assembly, will mean the linker doesn't get this hint.
Read-Only Author Jon Ward Posted 28-Jun-2005 23:26 GMT Toolset C51	RE: cannot link...says "?C_START" unresolved Jon Ward The following knowledgebase article may also help. http://www.keil.com/support/docs/1980.htm Jon
Read-Only Author Shishir Joshi Posted 28-Jun-2005 23:37 GMT Toolset C51	RE: cannot link...says "?C_START" unresolved Shishir Joshi Great!!...Thankyou all for the help

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