250125.2 · d8463c25491b6150d748155ac530a3205d072e37

Move closer to the standard autotools idiom. (#3187)

* Create `src/config.h` instead of passing everything on the compiler
command line.
* To reduce the magnitude of this change, add `--include src/config.h`
to CFLAGS instead of adding `#include "src/config.h"` at the top of
each source file. Not all compilers support this, but I don't think
we care about anything other than gcc and clang at this point.
* Rather than generate `src/config_opts.inc`, emit `JQ_CONFIG` directly
into `src/config.h`.
* Rather than generate `src/version.h`, define `JQ_VERSION` as an alias
for the standard `PACKAGE_VERSION`.

@@ -2,8 +2,8 @@ dnl AC_CHECK_MATH_FUNC(func) AC_DEFUN([AC_CHECK_MATH_FUNC], [   AC_LANG(C)   AC_CHECK_LIB([m],[$1],[-    eval "ac_tr_func=HAVE_[]upcase($1)"-    AC_DEFINE_UNQUOTED($ac_tr_func)+    m4_define([ac_tr_func], [HAVE_]m4_toupper($1))+    AC_DEFINE(ac_tr_func, 1, [Define if you have the $1 math function.])   ],[   ]) ])