autoconf: split into subdirectories; redirect calls in debug builds

[m6w6/ext-psi] / m4 / posix / stddef.m4

diff --git a/m4/posix/stddef.m4 b/m4/posix/stddef.m4
new file mode 100644 (file)
index 0000000..fd52d2a
--- /dev/null
+++ b/m4/posix/stddef.m4
@@ -0,0 +1,18 @@
+PSI_CHECK_STDDEF() {
+    AC_CHECK_HEADERS(stddef.h)
+    PSI_TYPE(ptrdiff_t, int)
+    PSI_CONST(PTRDIFF_MIN, int)
+    PSI_CONST(PTRDIFF_MAX, int)
+    PSI_TYPE(size_t, uint)
+    PSI_CONST(SIZE_MAX, int)
+    PSI_TYPE(wchar_t, int)
+    if PSI_SH_TEST_SIZEOF(wchar_t); then :; else
+       # some platforms fail to provide wchar_t in stddef.h
+       unset ac_cv_sizeof_wchar_t
+       unset ax_cv_decl_wchar_t_signed
+       AC_CHECK_HEADERS(wchar.h)
+       PSI_TYPE(wchar_t, int)
+    fi
+    PSI_CONST(WCHAR_MIN, int)
+    PSI_CONST(WCHAR_MAX, int)
+}