This page about How to build applications on Linux. ISO C and its standard library are described in C Tips. POSIX/Linux specific features and enhancements are described in Linux Programming.

Use indent to constistently format your C-code. Here a configuration example for indent to be put in $HOME/.indent.pro:

/* Default Config: Use Kernighan & Ritchie coding style: */
--k-and-r-style
 
/* My minor variants to Kernighan & Ritchie Style: */
--line-length 80  /* Because default is 75 */
--no-tabs         /* Use spaces instead of tabs */
-brf              /* Place function opening brace after function declaration */

Usage:

find -name '*.c' -print0 | xargs -0 indent

Manual (Current Development)

• -c : Do not link
• -o file : Place output in file file. Applies to object files and executables
• -Wall : enable most warnings

Manual

• A line beginning with # is a comment
• The variable $* contains
• The variable $@ or $(@) contains the name of the target (tested)
• '@' at the beginning of a command runs the command but does not copy the line to stdout
• Implicit rules example: file.o is made automatically from file.c with a command of the form `$(CC) -c $(CPPFLAGS) $(CFLAGS)'
• To ignore errors in a command line, write a `-' at the beginning of the line's text (after the initial tab).
• make -n or make --dry-run - Don't actually run any commands; just print them.

a = Peter
c =  $(a)
d := $(a)
a = Franz
 
test:
        @echo c expands to $(c) # Franz
        @echo d expands to $(d) # Peter

Manual

[Makefile.am] → (automake) ⇒ [Makefile.in]

Manual

                               [Makefile.in]
                                     ⇓
[configure.ac] → (autoconf) ⇒ [(configure)] ⇒ [Makefile] -> make ⇒ ...