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PosixPP
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posixpp: Commit

The main posixpp library and associated tests.

Use library to create tiny, no-runtime support program.

diff -r 8e9f35b58b20 -r 21ff2fa93f67 CMakeLists.txt

--- a/CMakeLists.txt Sun May 02 07:48:07 2021 -0700

+++ b/CMakeLists.txt Sun May 02 10:03:13 2021 -0700

		@@ -10,9 +10,7 @@
10	10
11	11	find_package(fmt REQUIRED)
12	12
13		-option(BUILD_SHARED_LIBS "Build posixpp as a shared library." ON)
14		-
15		-add_library(posixpp empty.cpp)
	13	+add_library(posixpp SHARED empty.cpp)
16	14	set_property(TARGET posixpp PROPERTY CXX_EXTENSIONS OFF)
17	15	target_compile_features(posixpp PUBLIC cxx_std_20)
18	16	target_include_directories(posixpp PUBLIC

		@@ -20,6 +18,14 @@
20	18	$<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>
21	19	)
22	20
	21	+add_library(posixpp_static STATIC empty.cpp)
	22	+set_property(TARGET posixpp_static PROPERTY CXX_EXTENSIONS OFF)
	23	+target_compile_features(posixpp_static PUBLIC cxx_std_20)
	24	+target_include_directories(posixpp_static PUBLIC
	25	+ $<BUILD_INTERFACE:${CMAKE_CURRENT_LIST_DIR}/pubincludes>
	26	+ $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>
	27	+ )
	28	+
23	29	add_executable(all_tests
24	30	tests/simplefd.cpp tests/expected.cpp tests/flagset.cpp
25	31	tests/tempdir.h pubincludes/posixpp/fdflags.h

		@@ -37,6 +43,17 @@
37	43	target_compile_features(junk PUBLIC cxx_std_20)
38	44	target_link_libraries(junk posixpp)
39	45
	46	+# This currently only works when optimization can eliminate all exception
	47	+# handling code. Exception handling requires C++ runtime support that's not
	48	+# yet implemented as part of this library.
	49	+add_executable(helloworld
	50	+ examples/helloworld.cpp)
	51	+set_property(TARGET helloworld PROPERTY CXX_EXTENSIONS OFF)
	52	+target_compile_features(helloworld PUBLIC cxx_std_20)
	53	+target_link_libraries(helloworld posixpp_static)
	54	+# These are specific to g++. I think they will also work with CLang.
	55	+target_link_options(helloworld PUBLIC -nodefaultlibs -nostartfiles -e main)
	56	+
40	57	include(CTest)
41	58	include(Catch)
42	59	catch_discover_tests(all_tests)

diff -r 8e9f35b58b20 -r 21ff2fa93f67 examples/helloworld.cpp

--- /dev/null Thu Jan 01 00:00:00 1970 +0000

+++ b/examples/helloworld.cpp Sun May 02 10:03:13 2021 -0700

		@@ -0,0 +1,12 @@
	1	+#include <posixpp/fd.h>
	2	+#include <posixpp/expected.h>
	3	+#include <posixpp/basic.h>
	4	+
	5	+int main(int argc, char const * const *argv)
	6	+{
	7	+ const ::posixpp::fd fdout{1};
	8	+ static constexpr char msg[] = "Hello World!\n";
	9	+ // sizeof(msg) - 1 to skip trailing '\0'
	10	+ auto result = fdout.write(msg, sizeof(msg) - 1);
	11	+ ::posixpp::exit(result.has_error());
	12	+}