Specifications

48 Troubleshooting and Portability Issues Chapter 4

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Compiler Usage Guidelines for AMD64 Platforms

Enable exception handling with the appropriate /EH switch.

4.7 Sun Compilers (64-bit) for Solaris

See section 4.13, “Sun Compilers (32-bit) for Solaris”, on page 54 for the portability and

troubleshooting issues with this compiler.

4.8 GCC Compilers (32-Bit) for Linux

This section addresses errors and unexpected results that may be encountered when using 32-bit GNU

Compiler Collection (GCC) compilers for Linux®.

4.8.1 Compilation Errors

Do you need ANSI-compliant code?

If a developer requires ANSI-compliant code in a program, the GCC compiler provides the -ansi

switch to test the ANSI-compliance of the code in a program. To see gratuitous errors and warnings

for the non-ANSI parts of the program, the user should use the -pedantic switch. The user can then

modify the program to be ANSI-compliant. The user can also use the -std switch to specify the

required version of ISO C.

GCC also provides the -Wall switch to show almost all warnings. This switch enables all the

warnings about constructions that some users consider questionable.

Users should note that -Wall is not sufficient to get all warnings from gcc. Warning switches that turn

GCC into an effective 'lint' are: -Werror, -Wall, -W, -Wstrict-prototypes, -Wmissing-prototypes, -

Wpointer-arith, -Wreturn-type, -Wcast-qual, -Wwrite-strings, -Wswitch, -Wshadow,

-Wcast-align, -Wuninitialized, -Wbad-function-cast, -Wchar-subscripts, -Winline,

-Wnested-externs, -Wredundant-decl, -ansi, -pedantic. For further details on these switches, refer

to the GCC manual.

4.8.2 Link-Time Errors

Are you trying to link C and Fortran code?

Compile the Fortran 77 code with the -fno-f2c switch. The -fno-f2c switch prevents the g77

command from generating code designed to be compatible with code generated by the f2c command

and uses the GNU calling conventions instead.

4.8.3 Run-Time Errors

Is your code causing buffer overruns?

Turn on the -fbounds-check switch. When the -fbounds-check switch is turned on, the GCC

compiler generates additional code that checks whether the indices used to access arrays are or are not