build: fix -I options

* configure.ac (AM_INIT_AUTOMAKE): Add nostdinc.
* Makefile.am (AM_CPPFLAGS): Append -I$(builddir) and -I$(srcdir).
* tests/Makefile.am (AM_CPPFLAGS): Likewise.

Makefile.am

@@ -21,7 +21,9 @@ AM_CFLAGS = $(WARN_CFLAGS)
 AM_CPPFLAGS = -I$(builddir)/$(OS)/$(ARCH) \
 	      -I$(srcdir)/$(OS)/$(ARCH) \
 	      -I$(builddir)/$(OS) \
-	      -I$(srcdir)/$(OS)
+	      -I$(srcdir)/$(OS) \
+	      -I$(builddir) \
+	      -I$(srcdir)
 
 include xlat/Makemodule.am
 

configure.ac

@@ -6,7 +6,7 @@ AC_INIT([strace],
 AC_CONFIG_SRCDIR([strace.c])
 AC_CONFIG_AUX_DIR([.])
 AC_CONFIG_HEADERS([config.h])
-AM_INIT_AUTOMAKE([foreign dist-xz no-dist-gzip silent-rules parallel-tests])
+AM_INIT_AUTOMAKE([foreign nostdinc dist-xz no-dist-gzip silent-rules parallel-tests])
 AM_MAINTAINER_MODE
 AC_CANONICAL_HOST
 

tests/Makefile.am

@@ -6,7 +6,9 @@ AM_CFLAGS = $(WARN_CFLAGS)
 AM_CPPFLAGS = -I$(top_builddir)/$(OS)/$(ARCH) \
 	      -I$(top_srcdir)/$(OS)/$(ARCH) \
 	      -I$(top_builddir)/$(OS) \
-	      -I$(top_srcdir)/$(OS)
+	      -I$(top_srcdir)/$(OS) \
+	      -I$(top_builddir) \
+	      -I$(top_srcdir)
 
 check_PROGRAMS = \
 	aio \