Flags for configured algorithms generated in config.h (#177)

* Flags for configured algorithms generated in config.h

* Fix issue 168

* Separate artifacts for windows build and Non-windows build

Makefile.am

@@ -123,6 +123,7 @@ endif
 
 links:
 	$(MKDIR_P) include/oqs
+	cp -f config.h include/oqs
 	cp -f src/common/common.h include/oqs
 	cp -f src/crypto/aes/aes.h include/oqs
 	cp -f src/crypto/rand/rand.h include/oqs

README.md

@@ -189,6 +189,10 @@ To build with `sig_picnic` enabled:
 	make clean
 	make
 	make test   (this generates data needed by the Picnic library)
+ 
+### Configured Algorithms
+
+Flags for all the configured algorithms are generated in config.h file.
 
 Building and running on Windows
 -------------------------------

configure.ac

@@ -182,31 +182,37 @@ SRCDIR=${SRCDIR}" src/kex_rlwe_bcns15"
 if test x"$kex_lwe_frodo" = x"true"; then
   SRCDIR=${SRCDIR}" src/kex_lwe_frodo"
   AM_CPPFLAGS=${AM_CPPFLAGS}" -DENABLE_KEX_LWE_FRODO"
+  AC_DEFINE(ENABLE_KEX_LWE_FRODO, 1, "Define to 1 when FRODO enabled")
 fi
 
 if test x"$kex_mlwe_kyber" = x"true"; then
   SRCDIR=${SRCDIR}" src/kex_mlwe_kyber"
   AM_CPPFLAGS=${AM_CPPFLAGS}" -DENABLE_KEX_MLWE_KYBER"
+  AC_DEFINE(ENABLE_KEX_MLWE_KYBER, 1, "Define to 1 when KYBER enabled")
 fi
 
 if test x"$kex_ntru" = x"true"; then
   SRCDIR=${SRCDIR}" src/kex_ntru"
   AM_CPPFLAGS=${AM_CPPFLAGS}" -DENABLE_KEX_NTRU"
+  AC_DEFINE(ENABLE_KEX_NTRU, 1, "Define to 1 when NTRU enabled")
 fi
 
 if test x"$kex_rlwe_msrln16" = x"true"; then
   SRCDIR=${SRCDIR}" src/kex_rlwe_msrln16"
   AM_CPPFLAGS=${AM_CPPFLAGS}" -DENABLE_KEX_RLWE_MSRLN16"
+  AC_DEFINE(ENABLE_KEX_RLWE_MSRLN16, 1, "Define to 1 when RLWE MSRLN16 enabled")
 fi
 
 if test x"$kex_rlwe_newhope" = x"true"; then
   SRCDIR=${SRCDIR}" src/kex_rlwe_newhope"
   AM_CPPFLAGS=${AM_CPPFLAGS}" -DENABLE_KEX_RLWE_NEWHOPE"
+  AC_DEFINE(ENABLE_KEX_RLWE_NEWHOPE, 1, "Define to 1 when RLWE NEWHOPE enabled")
 fi
 
 if test x"$kex_sidh_cln16" = x"true"; then
   SRCDIR=${SRCDIR}" src/kex_sidh_cln16"
   AM_CPPFLAGS=${AM_CPPFLAGS}" -DENABLE_KEX_SIDH_CLN16"
+  AC_DEFINE(ENABLE_KEX_SIDH_CLN16, 1, "Define to 1 when SIDH CLN16 enabled")
 fi
 
 SRCDIR=${SRCDIR}" src/sig"
@@ -229,10 +235,12 @@ if test x"$openssl" = x"true"; then
 fi
 if test x"$kex_code_mcbits" = x"true"; then
   AM_CPPFLAGS=${AM_CPPFLAGS}" -DENABLE_CODE_MCBITS"
+  AC_DEFINE(ENABLE_CODE_MCBITS, 1, "Define to 1 when MCBITS enabled")
 fi
 if test x"$kex_sidh_iqc_ref" = x"true"; then
   AM_CPPFLAGS=${AM_CPPFLAGS}" -DENABLE_SIDH_IQC_REF"
   SRCDIR=${SRCDIR}" src/kex_sidh_iqc_ref"
+  AC_DEFINE(ENABLE_SIDH_IQC_REF, 1, "Define to 1 when SIDH IQC enabled")
 fi
 
 AC_SUBST(AM_CPPFLAGS)

src/kex/kex.h

@@ -11,6 +11,10 @@
 
 #include <oqs/rand.h>
 
+#if !defined(WINDOWS)
+#include <oqs/config.h>
+#endif
+
 enum OQS_KEX_alg_name {
 	OQS_KEX_alg_default,
 	OQS_KEX_alg_rlwe_bcns15,