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Building Linux applications/libs in GCC emulation mode

Marius Cetateanu
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  • Note: This was originally posted on 2nd June 2011 at http://forums.arm.com

    [font=arial, verdana, tahoma, sans-serif][size=2]I have played around with this... it doesn't look like armcc translates any of the -Wxyz warning options from gcc (except -Wall).  But, it seems to handle -f* options where its has equivalentsI think that warning L6238E is harmless in almost all cases; it is given by armlink because libgcc and other GCC/GNU assembler-built libraries don't contain ARM build attributes for marking that 8-byte stack alignment is required/preserved. You could just suppress this globally by setting ARMCC50_LINKOPT="--diag_suppress=6238".  Warning L6439W is again harmless; it'll most likely be generated for out-of-line copies of inline functions in Comdat groups, where GCC hasn't strictly followed ELF rules about the groups and therefore armlink is rejecting that copy and instead using a copy from the same Comdat group that was generated in one of the armcc-compiled object files.Updating to the latest GNU toolchain is also worth a punt.

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  • Note: This was originally posted on 2nd June 2011 at http://forums.arm.com

    [font=arial, verdana, tahoma, sans-serif][size=2]I have played around with this... it doesn't look like armcc translates any of the -Wxyz warning options from gcc (except -Wall).  But, it seems to handle -f* options where its has equivalentsI think that warning L6238E is harmless in almost all cases; it is given by armlink because libgcc and other GCC/GNU assembler-built libraries don't contain ARM build attributes for marking that 8-byte stack alignment is required/preserved. You could just suppress this globally by setting ARMCC50_LINKOPT="--diag_suppress=6238".  Warning L6439W is again harmless; it'll most likely be generated for out-of-line copies of inline functions in Comdat groups, where GCC hasn't strictly followed ELF rules about the groups and therefore armlink is rejecting that copy and instead using a copy from the same Comdat group that was generated in one of the armcc-compiled object files.Updating to the latest GNU toolchain is also worth a punt.

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