Go to the first, previous, next, last section, table of contents.
Occasionally it is useful to know which `Makefile' variables
Automake uses for compilations; for instance you might need to do your
own compilation in some special cases.
Some variables are inherited from Autoconf; these are CC,
CFLAGS, CPPFLAGS, DEFS, LDFLAGS, and
LIBS.
There are some additional variables which Automake itself defines:
AM_CPPFLAGS
-
The contents of this macro are passed to every compilation which invokes
the C preprocessor; it is a list of arguments to the preprocessor. For
instance, `-I' and `-D' options should be listed here.
Automake already provides some `-I' options automatically. In
particular it generates `-I$(srcdir)', `-I.', and a `-I'
pointing to the directory holding `config.h' (if you've used
AC_CONFIG_HEADER or AM_CONFIG_HEADER). You can disable
the default `-I' options using the `nostdinc' option.
INCLUDES
-
This does the same job as `AM_CPPFLAGS'. It is an older name for
the same functionality. This macro is deprecated; we suggest using
`AM_CPPFLAGS' instead.
AM_CFLAGS
-
This is the variable which the `Makefile.am' author can use to pass
in additional C compiler flags. It is more fully documented elsewhere.
In some situations, this is not used, in preference to the
per-executable (or per-library)
CFLAGS.
COMPILE
-
This is the command used to actually compile a C source file. The
filename is appended to form the complete command line.
LINK
-
This is the command used to actually link a C program. It already
includes `-o $@' and the usual variable references (for instance,
CFLAGS); it takes as "arguments" the names of the object files
and libraries to link in.
Go to the first, previous, next, last section, table of contents.