Test with 3.0.0-beta2 (pyca#6192)

- OpenSSL 3.0.0-beta2 now uses lib64 on X86_64
- fail on implicit function definition

Author: tiran

.github/workflows/ci.yml

@@ -19,9 +19,10 @@ jobs:
           - {VERSION: "3.9", TOXENV: "flake,rust,docs", COVERAGE: "false"}
           - {VERSION: "pypy3", TOXENV: "pypy3"}
           - {VERSION: "3.9", TOXENV: "py39", OPENSSL: {TYPE: "openssl", VERSION: "1.1.0l"}}
-          - {VERSION: "3.9", TOXENV: "py39", OPENSSL: {TYPE: "openssl", VERSION: "1.1.1i"}}
-          - {VERSION: "3.9", TOXENV: "py39-ssh", OPENSSL: {TYPE: "openssl", VERSION: "1.1.1i"}}
-          - {VERSION: "3.9", TOXENV: "py39", OPENSSL: {TYPE: "openssl", VERSION: "1.1.1i", CONFIG_FLAGS: "no-engine no-rc2 no-srtp no-ct"}}
+          - {VERSION: "3.9", TOXENV: "py39", OPENSSL: {TYPE: "openssl", VERSION: "1.1.1k"}}
+          - {VERSION: "3.9", TOXENV: "py39-ssh", OPENSSL: {TYPE: "openssl", VERSION: "1.1.1k"}}
+          - {VERSION: "3.9", TOXENV: "py39", OPENSSL: {TYPE: "openssl", VERSION: "1.1.1k", CONFIG_FLAGS: "no-engine no-rc2 no-srtp no-ct"}}
+          - {VERSION: "3.9", TOXENV: "py39", OPENSSL: {TYPE: "openssl", VERSION: "3.0.0-beta2"}}
           - {VERSION: "3.9", TOXENV: "py39", OPENSSL: {TYPE: "libressl", VERSION: "2.9.2"}}
           - {VERSION: "3.9", TOXENV: "py39", OPENSSL: {TYPE: "libressl", VERSION: "3.0.2"}}
           - {VERSION: "3.9", TOXENV: "py39", OPENSSL: {TYPE: "libressl", VERSION: "3.1.5"}}
@@ -82,8 +83,8 @@ jobs:
         if: matrix.PYTHON.OPENSSL && steps.ossl-cache.outputs.cache-hit != 'true'
       - name: Set CFLAGS/LDFLAGS
         run: |
-          echo "CFLAGS=${CFLAGS} -I${OSSL_PATH}/include" >> $GITHUB_ENV
-          echo "LDFLAGS=${LDFLAGS} -L${OSSL_PATH}/lib -Wl,-rpath=${OSSL_PATH}/lib" >> $GITHUB_ENV
+          echo "CFLAGS=${CFLAGS} -Werror=implicit-function-declaration -I${OSSL_PATH}/include" >> $GITHUB_ENV
+          echo "LDFLAGS=${LDFLAGS} -L${OSSL_PATH}/lib -L${OSSL_PATH}/lib64 -Wl,-rpath=${OSSL_PATH}/lib -Wl,-rpath=${OSSL_PATH}/lib64" >> $GITHUB_ENV
         if: matrix.PYTHON.OPENSSL
       - name: Tests
         run: |