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To check for a syntax feature of the C, C++ or Fortran 77 compiler, such
as whether it recognizes a certain keyword, use AC_TRY_COMPILE
to
try to compile a small program that uses that feature. You can also use
it to check for structures and structure members that are not present on
all systems.
This macro double quotes both includes and function-body.
For C and C++, includes is any #include
statements needed
by the code in function-body (includes will be ignored if
the currently selected language is Fortran 77). This macro also uses
CFLAGS
or CXXFLAGS
if either C or C++ is the currently
selected language, as well as CPPFLAGS
, when compiling. If
Fortran 77 is the currently selected language then FFLAGS
will be
used when compiling.
This macro does not try to link; use AC_TRY_LINK
if you need to
do that (see section 6.3 Examining Libraries).