13 files changed, 50 insertions, 18 deletions

diff --git a/.github/workflows/testsuite.yaml b/.github/workflows/testsuite.yaml
index b84998a..b022fb2 100644
--- a/.github/workflows/testsuite.yaml
+++ b/.github/workflows/testsuite.yaml
@@ -78,3 +78,30 @@ jobs:
         run: |
           make -C tests clean clang run > ./results.txt
           grep -zvq 'FAIL' ./results.txt
+
+  c_versions:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        version: ["c89", "c99", "c11", "c17"]
+    steps:
+      - name: Checking out the code
+        uses: actions/checkout@v3
+      - name: Cache musl toolchain
+        uses: actions/cache@v3
+        id: cache-musl
+        with:
+          path: x86_64-linux-musl-native
+          key: musl
+      - name: Downloading musl-based toolchain
+        if: steps.cache-musl.outputs.cache-hit != 'true'
+        run: wget --quiet https://musl.cc/x86_64-linux-musl-native.tgz
+      - name: Extracting musl-based toolchain
+        if: steps.cache-musl.outputs.cache-hit != 'true'
+        run: tar xzf ./x86_64-linux-musl-native.tgz
+      - name: Building with clang
+        shell: bash
+        run: make CFLAGS=-std=${{ matrix.version }} -C tests clean clang
+      - name: Building with gcc
+        shell: bash
+        run: make CFLAGS=-std=${{ matrix.version }} -C tests clean gcc
diff --git a/README.md b/README.md
index 86e73fc..e187776 100644
--- a/README.md
+++ b/README.md
@@ -21,8 +21,9 @@ on Clang. It was initially intended to be used on
 - Support for out-of-bounds read interfaces, such as send(), write(), fwrite() etc.
 - No ABI is enforced. All of the fortify check functions are inlined
   into the resulting binary.
-- It has a [comprehensive suite of tests](https://github.com/jvoisin/fortify-headers/tree/master/tests),
-  running both on Clang and on GCC for every commit, with
+- It has a [comprehensive suite of
+  tests](https://github.com/jvoisin/fortify-headers/tree/master/tests), running
+  both on Clang and on GCC for every commit, on C89, C99, C11 and C17, with
   [significant coverage](https://jvoisin.github.io/fortify-headers/)
 - Defining `FORTIFY_USE_NATIVE_CHK` will make use of compiler-provided builtin `_chk`
   functions, which might be a bit better in term of diagnostics,
diff --git a/tests/Makefile b/tests/Makefile
index 333f088..a8c7ac5 100644
--- a/tests/Makefile
+++ b/tests/Makefile
@@ -159,7 +159,10 @@ clang: CFLAGS+=-I../x86_64-linux-musl-native/include/
 clang: CFLAGS+=-Ix86_64-linux-musl-native/include/
 clang: CFLAGS+=-nostdinc
 clang: CXX=clang++
-clang: CXXFLAGS=$(CFLAGS)
+clang: CXXFLAGS+=-I/usr/include/x86_64-linux-musl
+clang: CXXFLAGS+=-I../x86_64-linux-musl-native/include/
+clang: CXXFLAGS+=-Ix86_64-linux-musl-native/include/
+clang: CXXFLAGS+=-nostdinc
 clang: comptime $(RUNTIME_TARGETS) cpp
 
 coverage: CFLAGS += -fprofile-arcs -ftest-coverage
diff --git a/tests/common.h b/tests/common.h
index 4c34862..6a30739 100644
--- a/tests/common.h
+++ b/tests/common.h
@@ -15,6 +15,9 @@
    License along with the GNU C Library; if not, see
    <https://www.gnu.org/licenses/>.  */
 
+#define _POSIX_C_SOURCE 1
+#define _XOPEN_SOURCE 700
+
 #include <setjmp.h>
 #include <unistd.h>
 #include <signal.h>
diff --git a/tests/test_compile.c b/tests/test_compile.c
index edbbb27..b794306 100644
--- a/tests/test_compile.c
+++ b/tests/test_compile.c
@@ -12,7 +12,7 @@
 #include <sys/socket.h>
 #include <sys/stat.h>
 
-// Check that all headers are compiling.
+/* Check that all headers are compiling.*/
 int main(int argc, char** argv) {
   return 0;
 }
diff --git a/tests/test_fread_overwrite_dynamic.c b/tests/test_fread_overwrite_dynamic.c
index 74953d6..b108dc5 100644
--- a/tests/test_fread_overwrite_dynamic.c
+++ b/tests/test_fread_overwrite_dynamic.c
@@ -1,7 +1,6 @@
-#include <assert.h>
-
 #include "common.h"
 
+#include <assert.h>
 #include <stdio.h>
 
 int main(int argc, char** argv) {
diff --git a/tests/test_fread_overwrite_static.c b/tests/test_fread_overwrite_static.c
index e9de2ce..16a5e30 100644
--- a/tests/test_fread_overwrite_static.c
+++ b/tests/test_fread_overwrite_static.c
@@ -1,7 +1,6 @@
-#include <assert.h>
-
 #include "common.h"
 
+#include <assert.h>
 #include <stdio.h>
 
 int main(int argc, char** argv) {
diff --git a/tests/test_fwrite_overwrite_dynamic.c b/tests/test_fwrite_overwrite_dynamic.c
index a7f2b1b..7da64ab 100644
--- a/tests/test_fwrite_overwrite_dynamic.c
+++ b/tests/test_fwrite_overwrite_dynamic.c
@@ -1,7 +1,6 @@
-#include <assert.h>
-
 #include "common.h"
 
+#include <assert.h>
 #include <stdio.h>
 
 int main(int argc, char** argv) {
diff --git a/tests/test_fwrite_overwrite_static.c b/tests/test_fwrite_overwrite_static.c
index 492fb47..f844af8 100644
--- a/tests/test_fwrite_overwrite_static.c
+++ b/tests/test_fwrite_overwrite_static.c
@@ -1,7 +1,6 @@
-#include <assert.h>
-
 #include "common.h"
 
+#include <assert.h>
 #include <stdio.h>
 
 int main(int argc, char** argv) {
diff --git a/tests/test_getdomainname_dynamic.c b/tests/test_getdomainname_dynamic.c
index a7882ba..3c15b8e 100644
--- a/tests/test_getdomainname_dynamic.c
+++ b/tests/test_getdomainname_dynamic.c
@@ -1,6 +1,7 @@
-#include "common.h"
-
 #define _GNU_SOURCE
+#define _DEFAULT_SOURCE
+
+#include "common.h"
 
 #include <unistd.h>
 
diff --git a/tests/test_getdomainname_static.c b/tests/test_getdomainname_static.c
index a7671c4..478a274 100644
--- a/tests/test_getdomainname_static.c
+++ b/tests/test_getdomainname_static.c
@@ -1,6 +1,7 @@
-#include "common.h"
-
 #define _GNU_SOURCE
+#define _DEFAULT_SOURCE
+
+#include "common.h"
 
 #include <unistd.h>
 
diff --git a/tests/test_mbstowcs_dynamic.c b/tests/test_mbstowcs_dynamic.c
index 1465bfd..fd02ed9 100644
--- a/tests/test_mbstowcs_dynamic.c
+++ b/tests/test_mbstowcs_dynamic.c
@@ -3,7 +3,7 @@
 #include <stdlib.h>
 
 int main(int argc, char** argv) {
-  const char* mbstr = "z\u00df\u6c34\U0001f34c"; // or u8"zß水🍌"
+  const char* mbstr = "z\u00df\u6c34\U0001f34c"; /* or u8"zß水🍌" */
   wchar_t wstr[5];
   mbstowcs(wstr, mbstr, 4);
 
diff --git a/tests/test_mbstowcs_static.c b/tests/test_mbstowcs_static.c
index a15c4d6..847fcf7 100644
--- a/tests/test_mbstowcs_static.c
+++ b/tests/test_mbstowcs_static.c
@@ -3,7 +3,7 @@
 #include <stdlib.h>
 
 int main(int argc, char** argv) {
-  const char* mbstr = "z\u00df\u6c34\U0001f34c"; // or u8"zß水🍌"
+  const char* mbstr = "z\u00df\u6c34\U0001f34c"; /* or u8"zß水🍌" */
   wchar_t wstr[5];
   mbstowcs(wstr, mbstr, 4);