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Full Discussion: Why does this example C code run and yet SHOULD either not compile or give a segmentation fault?
Top Forums Programming Why does this example C code run and yet SHOULD either not compile or give a segmentation fault? Post 303033014 by Corona688 on Thursday 28th of March 2019 11:28:12 AM
Old 03-28-2019
Further, doing things you didn't ask the compiler to do is begging for trouble. The compiler loves to remove things you "don't use", to the point that if you never touch a variable in your program, it might optimize it away completely and use hardcoded values instead. You have to make these variables 'volatile' to force the compiler to not do anything smart and helpful for you.
 

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LEARN ABOUT DEBIAN

sc-config

SC-CONFIG(1)						      General Commands Manual						      SC-CONFIG(1)

NAME

       sc-config - script to get information about the installed version of SC

SYNOPSIS

       sc-config  [--prefix[=DIR]  ]  [--exec-prefix[=DIR]  ]  [--version]  [--libs]  [--cppflags]  [--cc] [--cflags] [--cxx] [--cxxflags] [--f77]
       [--f77flags]

DESCRIPTION

       The sc-config program can be used to obtain the compilers, compiler options and libraries needed to use the SC (Scientific Computing) tool-
       kit from your program.

OPTIONS

       The sc-config program returns information about how SC was compiled and installed. The following information is available:

       --prefix
	       The directory where SC is installed.

       --version
	       The version of SC.

       --libdir
	       The directory were the libraries are found.

       --libs  The libraries and library paths needed to link.

       --cppflags
	       The include directories needed to build.

       --cc    The C compiler.

       --cflags
	       The C compiler flags.

       --cxx   The C++ compiler.

       --cxxflags
	       The C++ compiler flags.

       --f77   The FORTRAN 77 compiler.

       --f77flags
	       The FORTRAN 77 compiler flags.

EXAMPLES

       To use the sc-config program to link your executable to SC, use a Makefile for GNU make similar to the following:

	      SCCONFIG = /usr/bin/sc-config
	      CXX := $(shell $(SCCONFIG) --cxx)
	      CXXFLAGS := $(shell $(SCCONFIG) --cxxflags)
	      CPPFLAGS := $(shell $(SCCONFIG) --cppflags)
	      LIBS := $(shell $(SCCONFIG) --libs)

	      myprog: myprog.o
		      $(CXX) $(CXXFLAGS) -o $@ $^ $(LIBS)

Version 2							    15 Feb 2001 						      SC-CONFIG(1)
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