Problem: CI use of sodium or nacl is confusing

Solution: establish a matrix of CI options. On one axis we have the
build system (autotools, cmake, android) and on the other axis we
have the encryption options (tweetnacl, libsodium or none).

.travis.yml

@@ -7,9 +7,14 @@ os:
 - osx
 
 env:
+- BUILD_TYPE=default CURVE=libsodium
+- BUILD_TYPE=android CURVE=libsodium
+- BUILD_TYPE=cmake CURVE=libsodium
+- BUILD_TYPE=default CURVE=tweetnacl
+- BUILD_TYPE=android CURVE=tweetnacl
+- BUILD_TYPE=cmake CURVE=tweetnacl
 - BUILD_TYPE=default
 - BUILD_TYPE=android
-- BUILD_TYPE=libsodium
 - BUILD_TYPE=cmake
 
 sudo: false

builds/android/build.sh

@@ -25,6 +25,12 @@ if [[ $ANDROID_BUILD_CLEAN ]]; then
     rm -rf "${ANDROID_BUILD_PREFIX}"/*
 fi
 
+if [ -z $CURVE ]; then
+    CURVE="--disable-curve"
+    VERIFY="libzmq.so"
+elif [ $CURVE == "libsodium" ]; then
+    CURVE="--with-libsodium=yes"
+    VERIFY="libzmq.so libsodium.so"
     ##
     # Build libsodium from latest master branch
 
@@ -36,18 +42,23 @@ fi
             && make -j 4 \
             && make install) || exit 1
     }
+elif [ $CURVE == "tweetnacl" ]; then
+    # Default
+    CURVE=""
+    VERIFY="libzmq.so"
+fi
 
 ##
 # Build libzmq from local source
 
 LIBTOOL_EXTRA_LDFLAGS='-avoid-version'
 
-(android_build_verify_so "libzmq.so" "libsodium.so" &> /dev/null) || {
+(android_build_verify_so ${VERIFY} &> /dev/null) || {
     rm -rf "${cache}/libzmq"
     (cp -r ../.. "${cache}/libzmq" && cd "${cache}/libzmq" && make clean)
     
     (cd "${cache}/libzmq" && ./autogen.sh \
-        && ./configure --quiet "${ANDROID_BUILD_OPTS[@]}" --without-docs --with-libsodium=yes \
+        && ./configure --quiet "${ANDROID_BUILD_OPTS[@]}" ${CURVE} --without-docs \
         && make -j 4 \
         && make install) || exit 1
 }
@@ -55,5 +66,5 @@ LIBTOOL_EXTRA_LDFLAGS='-avoid-version'
 ##
 # Verify shared libraries in prefix
 
-android_build_verify_so "libzmq.so" "libsodium.so"
+android_build_verify_so ${VERIFY}
 echo "libzmq android build succeeded"

builds/cmake/ci_build.sh

@@ -18,5 +18,14 @@ CMAKE_OPTS+=("-DCMAKE_PREFIX_PATH:PATH=${BUILD_PREFIX}")
 CMAKE_OPTS+=("-DCMAKE_LIBRARY_PATH:PATH=${BUILD_PREFIX}/lib")
 CMAKE_OPTS+=("-DCMAKE_INCLUDE_PATH:PATH=${BUILD_PREFIX}/include")
 
+if [ -z $CURVE ]; then
+    CMAKE_OPTS+=("-DENABLE_CURVE=OFF")
+elif [ $CURVE == "libsodium" ]; then
+    CMAKE_OPTS+=("-DWITH_LIBSODIUM=ON")
+
+    git clone --depth 1 -b stable git://github.com/jedisct1/libsodium.git
+    ( cd libsodium; ./autogen.sh; ./configure --prefix=$BUILD_PREFIX; make install)
+fi
+
 # Build, check, and install from local source
 ( cd ../..; mkdir build_cmake && cd build_cmake && PKG_CONFIG_PATH=${BUILD_PREFIX}/lib/pkgconfig cmake "${CMAKE_OPTS[@]}" .. && make all VERBOSE=1 && make install ) || exit 1

builds/libsodium/ci_build.sh

@@ -1,30 +0,0 @@
-#!/usr/bin/env bash
-
-set -x
-
-mkdir tmp
-BUILD_PREFIX=$PWD/tmp
-
-CONFIG_OPTS=()
-CONFIG_OPTS+=("CFLAGS=-I${BUILD_PREFIX}/include")
-CONFIG_OPTS+=("CPPFLAGS=-I${BUILD_PREFIX}/include")
-CONFIG_OPTS+=("CXXFLAGS=-I${BUILD_PREFIX}/include")
-CONFIG_OPTS+=("LDFLAGS=-L${BUILD_PREFIX}/lib")
-CONFIG_OPTS+=("PKG_CONFIG_PATH=${BUILD_PREFIX}/lib/pkgconfig")
-CONFIG_OPTS+=("--prefix=${BUILD_PREFIX}")
-
-#   Build required projects first
-
-#   libsodium
-git clone --depth 1 -b stable git://github.com/jedisct1/libsodium.git
-( cd libsodium; ./autogen.sh; ./configure --prefix=$BUILD_PREFIX; make check; make install)
-
-#   Build and check this project
-(
-    cd ../..;
-    ./autogen.sh &&
-    ./configure "${CONFIG_OPTS[@]}" --with-libsodium=yes &&
-    make &&
-    ( if make check; then true; else cat test-suite.log; exit 1; fi ) &&
-    make install
-) || exit 1

ci_build.sh

@@ -14,6 +14,15 @@ if [ $BUILD_TYPE == "default" ]; then
     CONFIG_OPTS+=("PKG_CONFIG_PATH=${BUILD_PREFIX}/lib/pkgconfig")
     CONFIG_OPTS+=("--prefix=${BUILD_PREFIX}")
 
+    if [ -z $CURVE ]; then
+        CONFIG_OPTS+=("--disable-curve")
+    elif [ $CURVE == "libsodium" ]; then
+        CONFIG_OPTS+=("--with-libsodium=yes")
+
+        git clone --depth 1 -b stable git://github.com/jedisct1/libsodium.git
+        ( cd libsodium; ./autogen.sh; ./configure --prefix=$BUILD_PREFIX; make check; make install)
+    fi
+
     #   Build and check this project
     (
         ./autogen.sh &&