ircd: Define all IRCD_USE_ as integers for constexprs.

configure.ac

@@ -1403,6 +1403,8 @@ AM_COND_IF(LINUX,
 
 if test "$aio" = "yes"; then
 	IRCD_DEFINE(USE_AIO, [1], [Linux AIO is supported and will be used])
+else
+	IRCD_DEFINE(USE_AIO, [0], [Linux AIO is not supported and won't be used])
 fi
 
 AM_CONDITIONAL([AIO], [[[[ $aio = yes ]]]])
@@ -1426,6 +1428,8 @@ AM_CONDITIONAL([IOU], [[[[ $io_uring = yes ]]]])
 AM_COND_IF([IOU],
 [
 	IRCD_DEFINE(USE_IOU, [1], [Linux io_uring is supported and may be used])
+], [
+	IRCD_DEFINE(USE_IOU, [0], [Linux io_uring is not available])
 ])
 
 
@@ -1659,6 +1663,13 @@ PKG_CHECK_MODULES(icuuc, [icuuc],
 AM_CONDITIONAL([ICUUC], [test "x$have_icuuc" = "xyes" ])
 AM_CONDITIONAL([ICU], [test "x$have_icu" = "xyes" ])
 
+AM_COND_IF(ICU,
+[
+	IRCD_DEFINE(USE_ICU, [1], [International Components for Unicode is available])
+], [
+	IRCD_DEFINE(USE_ICU, [0], [International Components for Unicode is not available])
+])
+
 dnl
 dnl
 dnl libsodium (NaCl) crypto support
@@ -2237,6 +2248,8 @@ dnl IRCD_ENABLE_MAGICK is always defined for use in a constexpr if
 AM_COND_IF([IMAGEMAGICK],
 [
 	IRCD_DEFINE(USE_MAGICK, [1], [Magick support is available and enabled])
+], [
+	IRCD_DEFINE(USE_MAGICK, [0], [Magick support is not available])
 ])
 
 dnl
@@ -2343,6 +2356,13 @@ PKG_CHECK_MODULES(LLVM, [LLVM],
 
 AM_CONDITIONAL([LLVM], [test "x$have_libllvm" = "xyes" ])
 
+AM_COND_IF(LLVM,
+[
+	IRCD_DEFINE(USE_LLVM, [1], [libllvm is available and enabled])
+], [
+	IRCD_DEFINE(USE_LLVM, [0], [libllvm is not available])
+])
+
 dnl
 dnl
 dnl LibDRM
@@ -2389,6 +2409,8 @@ AM_COND_IF([DRM],
 	AC_MSG_RESULT([yes])
 	IRCD_DEFINE(USE_DRM, [1], [DRM support is available and enabled])
 	DRM_LIBS+="-ldrm"
+], [
+	IRCD_DEFINE(USE_DRM, [0], [DRM support is not available])
 ])
 
 dnl
@@ -2465,7 +2487,11 @@ AM_COND_IF([OPENCL],
 	[
 		IRCD_DEFINE(USE_MESA_OPENCL, [1], [MesaOpenCL support is available and enabled])
 		OPENCL_LIBS+=" -lMesaOpenCL"
+	], [
+		IRCD_DEFINE(USE_MESA_OPENCL, [0], [MesaOpenCL support is not available and disabled])
 	])
+], [
+	IRCD_DEFINE(USE_OPENCL, [0], [OpenCL support is not available])
 ])
 
 dnl
@@ -2521,6 +2547,8 @@ AM_COND_IF([ARMNN],
 [
 	IRCD_DEFINE(USE_ARMNN, [1], [Arm NN support is available and enabled])
 	ARMNN_LIBS+="-larmnn"
+], [
+	IRCD_DEFINE(USE_ARMNN, [0], [Arm NN support is not available])
 ])
 
 dnl

include/ircd/cl/init.h

@@ -38,7 +38,7 @@ ircd::cl::init
 	init(), ~init() noexcept;
 };
 
-#ifndef IRCD_USE_OPENCL
+#if IRCD_USE_OPENCL == 0
 inline ircd::cl::init::init() {}
 inline ircd::cl::init::~init() noexcept {}
 #endif

include/ircd/magick.h

@@ -113,15 +113,7 @@ ircd::magick::init
 };
 
 // inline stubs when magick disabled/unavailable.
-#if !defined(IRCD_USE_MAGICK)
-
-inline
-ircd::magick::init::init()
-{}
-
-inline
-ircd::magick::init::~init()
-noexcept
-{}
-
-#endif IRCD_USE_MAGICK
+#if IRCD_USE_MAGICK == 0
+inline ircd::magick::init::init() {}
+inline ircd::magick::init::~init() noexcept {}
+#endif IRCD_USE_MAGICK == 0

ircd/fs.cc

@@ -15,16 +15,17 @@
 #include <RB_INC_SYS_RESOURCE_H
 #include <boost/filesystem.hpp>
 
-#ifdef IRCD_USE_AIO
+#if IRCD_USE_AIO > 0
 	#include "fs_aio.h"
 #endif
 
-#ifdef IRCD_USE_IOU
+#if IRCD_USE_IOU > 0
 	#include "fs_iou.h"
 #endif
 
 // TODO: prevents use until io_uring support implemented
 #undef IRCD_USE_IOU
+#define IRCD_USE_IOU 0
 
 namespace ircd::fs
 {
@@ -230,17 +231,13 @@ ircd::fs::support::rwf_write_life
 decltype(ircd::fs::support::aio)
 ircd::fs::support::aio
 {
-	#ifdef IRCD_USE_AIO
-		true
-	#else
-		false
-	#endif
+	IRCD_USE_AIO
 };
 
 void
 ircd::fs::support::dump_info()
 {
-	#if defined(IRCD_USE_AIO) || defined(IRCD_USE_IOU)
+	#if IRCD_USE_AIO || IRCD_USE_IOU
 		const bool support_async {true};
 	#else
 		const bool support_async {false};
@@ -779,21 +776,19 @@ ircd::fs::flush(const fd &fd,
 {
 	assert(opts.op == op::SYNC);
 
-	#ifdef IRCD_USE_IOU
-	if(iou::system && opts.aio)
-		return void(iou::fsync(fd, opts));
-	#endif
+	if constexpr(IRCD_USE_IOU)
+		if(iou::system && opts.aio)
+			return void(iou::fsync(fd, opts));
 
-	#ifdef IRCD_USE_AIO
-	if(aio::system && opts.aio)
-	{
-		if(support::aio_fdsync && !opts.metadata)
-			return void(aio::fsync(fd, opts));
+	if constexpr(IRCD_USE_AIO)
+		if(aio::system && opts.aio)
+		{
+			if(support::aio_fdsync && !opts.metadata)
+				return void(aio::fsync(fd, opts));
 
-		else if(support::aio_fsync && opts.metadata)
-			return void(aio::fsync(fd, opts));
-	}
-	#endif
+			else if(support::aio_fsync && opts.metadata)
+				return void(aio::fsync(fd, opts));
+		}
 
 	const prof::syscall_usage_warning message
 	{
@@ -1038,15 +1033,13 @@ ircd::fs::_read(const fd &fd,
 {
 	assert(opts.op == op::READ);
 
-	#ifdef IRCD_USE_IOU
-	if(likely(iou::system && opts.aio))
-		return iou::read(fd, iov, opts);
-	#endif
+	if constexpr(IRCD_USE_IOU)
+		if(likely(iou::system && opts.aio))
+			return iou::read(fd, iov, opts);
 
-	#ifdef IRCD_USE_AIO
-	if(likely(aio::system && opts.aio))
-		return aio::read(fd, iov, opts);
-	#endif
+	if constexpr(IRCD_USE_AIO)
+		if(likely(aio::system && opts.aio))
+			return aio::read(fd, iov, opts);
 
 	#ifdef HAVE_PREADV2
 	return support::preadv2?
@@ -1425,15 +1418,13 @@ ircd::fs::_write(const fd &fd,
 {
 	assert(opts.op == op::WRITE);
 
-	#ifdef IRCD_USE_IOU
-	if(likely(iou::system && opts.aio))
-		return iou::write(fd, iov, opts);
-	#endif
+	if constexpr(IRCD_USE_IOU)
+		if(likely(iou::system && opts.aio))
+			return iou::write(fd, iov, opts);
 
-	#ifdef IRCD_USE_AIO
-	if(likely(aio::system && opts.aio))
-		return aio::write(fd, iov, opts);
-	#endif
+	if constexpr(IRCD_USE_AIO)
+		if(likely(aio::system && opts.aio))
+			return aio::write(fd, iov, opts);
 
 	#ifdef HAVE_PWRITEV2
 	return support::pwritev2?
@@ -1671,14 +1662,14 @@ ircd::fs::aio::system;
 // init
 //
 
-#ifndef IRCD_USE_AIO
+#if IRCD_USE_AIO == 0
 ircd::fs::aio::init::init()
 {
 	assert(!system);
 }
 #endif
 
-#ifndef IRCD_USE_AIO
+#if IRCD_USE_AIO == 0
 [[using gnu: weak, cold]]
 ircd::fs::aio::init::~init()
 noexcept
@@ -1895,12 +1886,9 @@ ircd::fs::aio::stats::stats()
 decltype(ircd::fs::iou::support)
 ircd::fs::iou::support
 {
-	#ifdef IRCD_USE_IOU
-		info::kernel_version[0] > 5 ||
-		(info::kernel_version[0] >= 5 && info::kernel_version[1] >= 1)
-	#else
-		false
-	#endif
+	IRCD_USE_IOU &&
+	(info::kernel_version[0] > 5 ||
+	(info::kernel_version[0] >= 5 && info::kernel_version[1] >= 1))
 };
 
 /// Conf item to control whether iou is enabled or bypassed.
@@ -1927,7 +1915,7 @@ ircd::fs::iou::system;
 // init
 //
 
-#ifndef IRCD_USE_IOU
+#if IRCD_USE_IOU == 0
 [[gnu::weak]]
 ircd::fs::iou::init::init()
 {
@@ -1935,7 +1923,7 @@ ircd::fs::iou::init::init()
 }
 #endif
 
-#ifndef IRCD_USE_IOU
+#if IRCD_USE_IOU == 0
 [[gnu::weak]]
 ircd::fs::iou::init::~init()
 noexcept
@@ -2725,7 +2713,7 @@ ircd::fs::reflect(const op &op)
 	return "????";
 }
 
-#ifndef IRCD_USE_AIO
+#if IRCD_USE_AIO == 0
 [[gnu::weak]]
 ircd::fs::op
 ircd::fs::aio::translate(const int &val)
@@ -2734,7 +2722,7 @@ ircd::fs::aio::translate(const int &val)
 }
 #endif
 
-#ifndef IRCD_USE_IOU
+#if IRCD_USE_IOU == 0
 [[gnu::weak]]
 ircd::fs::op
 ircd::fs::iou::translate(const int &val)

ircd/fs_aio.cc

@@ -85,10 +85,9 @@ ircd::fs::aio::init::init()
 	// Don't init AIO if the io_uring is established. If it is, that means it
 	// was supported by the build, this kernel, and didn't encounter an error
 	// to construct. In all other cases AIO can serve as a fallback.
-	#if defined(IRCD_USE_IOU)
-	if(iou::system)
-		return;
-	#endif
+	if constexpr(IRCD_USE_IOU)
+		if(iou::system)
+			return;
 
 	assert(!system);
 	if(!aio::enable)

ircd/gpt_pipe.cc

@@ -32,6 +32,8 @@ ircd::gpt::pipe::handle_quit
 void
 ircd::gpt::pipe::init()
 {
+	if constexpr(!IRCD_USE_OPENCL)
+		return;
 }
 
 [[using gnu: cold, visibility("hidden")]]
@@ -39,6 +41,9 @@ void
 ircd::gpt::pipe::fini()
 noexcept
 {
+	if constexpr(!IRCD_USE_OPENCL)
+		return;
+
 	const auto pending
 	{
 		cl::work::list.size()

modules/console.cc

@@ -17284,6 +17284,12 @@ console_cmd__bridge__protocol(opt &out, const string_view &line)
 bool
 console_cmd__icu(opt &out, const string_view &line)
 {
+	if constexpr(!IRCD_USE_ICU)
+		throw error
+		{
+			"ICU is not available."
+		};
+
 	const unique_mutable_buffer buf
 	{
 		size(line) * 4
@@ -17553,6 +17559,12 @@ console_cmd__app__signal(opt &out, const string_view &line)
 bool
 console_cmd__cl__info(opt &out, const string_view &line)
 {
+	if constexpr(!IRCD_USE_OPENCL)
+		throw error
+		{
+			"OpenCL is not available."
+		};
+
 	const params param{line, " ",
 	{
 		"platform", "device",

modules/llvm.cc

@@ -8,13 +8,14 @@
 // copyright notice and this permission notice is present in all copies. The
 // full license for this software is available in the LICENSE file.
 
-#if !defined(IRCD_USE_LLVM) \
-&& __has_include("<llvm/Config/llvm-config.h>") \
-&& __has_include("<llvm/Object/Wasm.h>")
-	#define IRCD_USE_LLVM
+#if IRCD_USE_LLVM == 1 && \
+	(!__has_include("<llvm/Config/llvm-config.h>") || \
+	 ! __has_include("<llvm/Object/Wasm.h>"))
+	#undef IRCD_USE_LLVM
+	#define IRCD_USE_LLVM 0
 #endif
 
-#if defined(IRCD_USE_LLVM) // -------------------------------------------------
+#if IRCD_USE_LLVM > 0 // ------------------------------------------------------
 
 #include <llvm/Config/llvm-config.h>
 #include <llvm/Object/Wasm.h>
@@ -88,4 +89,4 @@ ircd::llvm::fini()
 
 }
 
-#endif // IRCD_USE_LLVM  ------------------------------------------------------
+#endif // IRCD_USE_LLVM > 0  --------------------------------------------------

modules/media/thumbnail.cc

@@ -282,11 +282,7 @@ get__thumbnail_local(client &client,
 	const bool supported
 	{
 		// Available in build
-		#ifdef IRCD_USE_MAGICK
-			(true)
-		#else
-			(false)
-		#endif
+		IRCD_USE_MAGICK
 
 		// Enabled by configuration
 		&& enable