devel/cpp-utilities: Add patch; Attempt to fix tests

devel/cpp-utilities/Makefile

@@ -1,6 +1,7 @@
 PORTNAME=	cpp-utilities
 DISTVERSIONPREFIX=	v
 DISTVERSION=	5.24.0
+PORTREVISION=	1
 CATEGORIES=	devel
 
 MAINTAINER=	yuri@FreeBSD.org
@@ -11,6 +12,7 @@ LICENSE=	GPLv2
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
 LIB_DEPENDS=	libboost_iostreams.so:devel/boost-libs
+TEST_DEPENDS=	cppunit>0:devel/cppunit
 
 USES=		cmake:testing compiler:c++17-lang
 USE_LDCONFIG=	yes
@@ -19,7 +21,6 @@ USE_GITHUB=	yes
 GH_ACCOUNT=	Martchus
 
 CMAKE_ON=	BUILD_SHARED_LIBS
-
-# unclear how to run tests, see https://github.com/Martchus/cpp-utilities/issues/26
+CMAKE_TESTING_ARGS=	-DEXCLUDE_TESTS_FROM_ALL=OFF # tests fail to link: ld: error: unable to find library -lcppunit, see https://github.com/Martchus/cpp-utilities/issues/27
 
 .include <bsd.port.mk>

devel/cpp-utilities/files/patch-tests_testutils.cpp

@@ -0,0 +1,11 @@
+--- tests/testutils.cpp.orig	2023-07-05 03:40:48 UTC
++++ tests/testutils.cpp
+@@ -621,7 +621,7 @@ std::vector<std::string> TestApplication::readTestfile
+     auto binaryPath = std::string();
+ #if defined(CPP_UTILITIES_USE_STANDARD_FILESYSTEM) && defined(PLATFORM_UNIX)
+     try {
+-        binaryPath = std::filesystem::read_symlink("/proc/self/exe").parent_path();
++        binaryPath = std::filesystem::read_symlink("/proc/curproc/file").parent_path();
+         binaryPath += '/';
+     } catch (const std::filesystem::filesystem_error &e) {
+         cerr << Phrases::Warning << "Unable to detect binary path for finding \"srcdirref\": " << e.what() << Phrases::EndFlush;