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`.

@@ -42,7 +42,7 @@ case "$ac_res" in 	yes) 	eval "ac_cv_func_$1=yes" 	eval "LIB_$1="-	AC_DEFINE_UNQUOTED($ac_tr_func)+	AC_DEFINE_UNQUOTED($ac_tr_func, 1, [Define if the $1 function is available.]) 	AC_MSG_RESULT([yes]) 	;; 	no)@@ -53,8 +53,8 @@ case "$ac_res" in 	*) 	eval "ac_cv_func_$1=yes" 	eval "ac_cv_lib_`echo "$ac_res" | sed 's/-l//'`=yes"-	AC_DEFINE_UNQUOTED($ac_tr_func)-	AC_DEFINE_UNQUOTED($ac_tr_lib)+	AC_DEFINE_UNQUOTED($ac_tr_func, 1, [Define if you have the $1 function.])+	AC_DEFINE_UNQUOTED($ac_tr_lib, 1, [Define if you have the $2 library.]) 	AC_MSG_RESULT([yes, in $ac_res]) 	;; esac