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OpenBSD 4.9: strcpy warnings & FORTRAN compiler
Hello,
I have installed OpenBSD 4.9 (on a Dell Optiplex) to update the hardware for an application written in FORTRAN. I am using the GNU FORTRAN compiler from the packages collection. (g95-4.2.4p5v0.tgz ). Compiling produces warnings about misuse of strcpy(), sprintf() and strcat(). /usr/local/.../libgfortran.so.2.0: warning: strcpy() is almost always misused, please use strlcpy() and similar for sprintf() and snprintf(), and strcat() and strlcat() I assume that these warnings come from issues within the FORTRAN compiler, and hence cannot be fixed by changing the FORTRAN code. Is there a way to stop these warnings from coming up, as they are annoying the owner of the FORTRAN application. Thank-you, Michael Hill |
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The OpenBSD developers created strlcpy(3) as a safer version of strcpy(3). Unfortunately for some reason most of the Linux/GNU community does not accept these safer versions and stick to the old ones.
You mentioned the warnings only appear during compilation, so it is only a one time thing
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You don't need to be a genius to debug a pf.conf firewall ruleset, you just need the guts to run tcpdump Last edited by J65nko; 23rd August 2011 at 09:08 AM. |
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To be more specific, the warning is emitted by the GNU linker, it is used by OpenBSD to warn when deprecated or unsafe functions/symbols are referenced by programs.
The follow section of code from the C library.. lib/libc/string/strcpy.c. Code:
#if defined(APIWARN) __warn_references(strcpy, "warning: strcpy() is almost always misused, please use strlcpy()"); #endif Code:
#if defined(APIWARN) __asm__(".section .gnu.warning." __STRING(strcpy) " ; .ascii \"" warning: strcpy() is almost always misused, please use strlcpy() "\" ; .text"); #endif |
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Thank-you for the clarification. I will let him know that it is not going to cause him any problems with his application.
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