X-Git-Url: https://sigrok.org/gitweb/?a=blobdiff_plain;f=configure.ac;h=d773d7f201cf674055f61195b6b27236fb7f8820;hb=56c8705e37314dafe35b680d2254b6f844e0ecc2;hp=b4ba2b3d9f7897fe3314c5ca941787bdce44acd4;hpb=6ec6c43b4738dbc7091f4a49a4ec80ea6102cb52;p=libsigrok.git

diff --git a/configure.ac b/configure.ac
index b4ba2b3d..d773d7f2 100644
--- a/configure.ac
+++ b/configure.ac
@@ -44,6 +44,12 @@ AC_PROG_LN_S
 # Required for per-target flags or subdir-objects with C sources.
 AM_PROG_CC_C_O
 
+# Set the standard the C library headers should conform to.
+AH_VERBATIM([_POSIX_C_SOURCE], [/* The targeted POSIX standard. */
+#ifndef _POSIX_C_SOURCE
+# define _POSIX_C_SOURCE 200112L
+#endif])
+
 # Get compiler versions.
 SR_PROG_VERSION([$CC], [sr_cc_version])
 SR_PROG_VERSION([$CXX], [sr_cxx_version])