configure: WARNING: unrecognized options: --with-compiler

[lyokha]

Cabal unconditionally passes option --with-compiler or --with-hc in Distribution.Simple.Setup.configureArgs. This makes configure run from cabal v1-configure or cabal v2-build print the warning.

This can be fixed by declaring dummy with-options in configure.ac

diff --git a/configure.ac b/configure.ac
index 93942e2..1a1c036 100644
--- a/configure.ac
+++ b/configure.ac
@@ -7,6 +7,10 @@ AC_CONFIG_HEADERS([cbits/hs_resolv_config.h])
 AC_PROG_CC
 AC_C_CONST
 
+dnl ignore options --with-compiler and --with-hc passed by cabal configure
+AC_ARG_WITH([compiler], [], [], [])
+AC_ARG_WITH([hc], [], [], [])
+
 AC_CHECK_HEADERS([netinet/in.h arpa/nameser.h])
 AC_CHECK_HEADER([resolv.h],,AC_MSG_ERROR([required <resolv.h> header not found]),[[
 #include <sys/types.h>

[andreasabel]

Unfortunately, I do not know anything about the Configure mode of cabal. I found some upstream issues:

• Replace the --with-compiler configure script argument with HC=/path/to/hc haskell/cabal#2947
• cabal configure with build-type: Configure should append rather than prepend --configure-options to the ./configure script haskell/cabal#2801
• build-type: configure configure script isn't passed the GHC exe set with -w to be used haskell/cabal#7452

[lyokha]

Thanks for the links! I found a good comment reading through them: haskell/cabal#2946 (comment). It says that a few packages want to "shut up" this warning by supplying macro definitions similar to what I proposed (except that I skip the help message). This all makes sense so far as the configure script makes no adjustments related to haskell compiler (as in the resolv's configure, and this is why it complains about the option) and only tests and configures C bits.

[andreasabel]

This all makes sense so far as the configure script makes no adjustments related to haskell compiler (as in the resolv's configure,

Ok, this sounds like you could go ahead with your proposed change.