write config.h, even if it is not used

.gitignore

@@ -9,6 +9,10 @@ src/Makefile
 src/src.pro
 *.Plo
 *.Po
+frida2
+pub/config.h
+pub/config.h.in
+pub/stamp*
 Makefile
 Makefile.in
 */Makefile

pub/configure.ac

@@ -12,6 +12,7 @@
 AC_INIT([frida], [2], [j.wuttke@fz-juelich.de])
 AC_CONFIG_AUX_DIR([build-aux])
 AC_CONFIG_SRCDIR([src/frida2.cpp]) # assure we have the right src dir
+AM_CONFIG_HEADER([config.h])
 AM_INIT_AUTOMAKE([-Wall -Werror foreign])
 
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