A. Frequently Asked Questions on Ingres for Linux : What Switches Do I Use to Compile C Applications?
 
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What Switches Do I Use to Compile C Applications?
What compiler and compiler switches were used to create the Linux version of Ingres? Are additional switches needed for compiling C-language application programs?
Ingres was compiled using the GCC compiler version 4.1.2 with the following switches:
-fsigned-char -fno-strength-reduce -D_REENTRANT -DLINUX -D_GNU_SOURCE -DXLIB_ILLEGAL_ACCESS -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -fPIC -O