meson: always define whether headers exist

Combined with -Wundef (added in 75758d2ccf & enforced in ba17673eed),
this provides absolute safety against #ifdef typos.

Signed-off-by: Eric Engestrom <eric.engestrom@intel.com>
Reviewed-by: Emil Velikov <emil.velikov@collabora.com>

Android.common.mk

@@ -1,6 +1,9 @@
 # XXX: Consider moving these to config.h analogous to autoconf.
 LOCAL_CFLAGS += \
 	-DMAJOR_IN_SYSMACROS=1 \
+	-DHAVE_ALLOCA_H=0 \
+	-DHAVE_SYS_SELECT_H=0 \
+	-DHAVE_SYS_SYSCTL_H=0 \
 	-DHAVE_VISIBILITY=1 \
 	-fvisibility=hidden \
 	-DHAVE_LIBDRM_ATOMIC_PRIMITIVES=1

amdgpu/amdgpu_cs.c

@@ -28,7 +28,7 @@
 #include <pthread.h>
 #include <sched.h>
 #include <sys/ioctl.h>
-#ifdef HAVE_ALLOCA_H
+#if HAVE_ALLOCA_H
 # include <alloca.h>
 #endif
 

meson.build

@@ -187,7 +187,7 @@ dep_m = cc.find_library('m', required : false)
 # FreeBSD requires sys/types.h for sys/sysctl.h, add it as part of the
 # includes when checking for headers.
 foreach header : ['sys/sysctl.h', 'sys/select.h', 'alloca.h']
-  config.set('HAVE_' + header.underscorify().to_upper(),
+  config.set10('HAVE_' + header.underscorify().to_upper(),
     cc.compiles('#include <sys/types.h>\n#include <@0@>'.format(header), name : '@0@ works'.format(header)))
 endforeach
 if (cc.has_header_symbol('sys/sysmacros.h', 'major') and

tests/amdgpu/basic_tests.c

@@ -30,7 +30,7 @@
 #endif
 #include <sys/stat.h>
 #include <fcntl.h>
-#ifdef HAVE_ALLOCA_H
+#if HAVE_ALLOCA_H
 # include <alloca.h>
 #endif
 #include <sys/wait.h>

tests/amdgpu/deadlock_tests.c

@@ -24,7 +24,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <unistd.h>
-#ifdef HAVE_ALLOCA_H
+#if HAVE_ALLOCA_H
 # include <alloca.h>
 #endif
 

tests/kms/kms-steal-crtc.c

@@ -28,7 +28,7 @@
 #include <stdint.h>
 #include <string.h>
 #include <unistd.h>
-#ifdef HAVE_SYS_SELECT_H
+#if HAVE_SYS_SELECT_H
 #include <sys/select.h>
 #endif
 

tests/kms/kms-universal-planes.c

@@ -28,7 +28,7 @@
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
-#ifdef HAVE_SYS_SELECT_H
+#if HAVE_SYS_SELECT_H
 #include <sys/select.h>
 #endif
 

tests/modetest/modetest.c

@@ -51,7 +51,7 @@
 #include <errno.h>
 #include <poll.h>
 #include <sys/time.h>
-#ifdef HAVE_SYS_SELECT_H
+#if HAVE_SYS_SELECT_H
 #include <sys/select.h>
 #endif
 #include <math.h>

tests/vbltest/vbltest.c

@@ -33,7 +33,7 @@
 #include <errno.h>
 #include <poll.h>
 #include <sys/time.h>
-#ifdef HAVE_SYS_SELECT_H
+#if HAVE_SYS_SELECT_H
 #include <sys/select.h>
 #endif
 

xf86drmMode.c

@@ -42,7 +42,7 @@
 #include <stdint.h>
 #include <stdlib.h>
 #include <sys/ioctl.h>
-#ifdef HAVE_SYS_SYSCTL_H
+#if HAVE_SYS_SYSCTL_H
 #include <sys/sysctl.h>
 #endif
 #include <stdio.h>