{"id":37084,"date":"2019-10-31T22:15:40","date_gmt":"2019-10-31T19:15:40","guid":{"rendered":"https:\/\/prohoster.info\/blog\/c-i-cmake-bratya-navek-chast-ii\/"},"modified":"2019-10-31T22:15:40","modified_gmt":"2019-10-31T19:15:40","slug":"c-i-cmake-bratya-navek-chast-ii","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sl\/blog\/administrirovanie\/c-i-cmake-bratya-navek-chast-ii","title":{"rendered":"C++ in CMake \u2014 bratje za vedno, del II","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><img decoding=\"async\" alt=\"C++ in CMake \u2014 bratje za vedno, del II\" src=\"\/wp-content\/uploads\/2019\/08\/1d86b8b1668ae29ff3e634df9059d9b1.png\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p><\/p>\n<p><noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/461817\/\">V prej\u0161njem delu<\/a><\/noindex> tega zanimivega pripovedovanja smo govorili o organizaciji glavne knji\u017enice znotraj generacijskega sistema za gradnjo CMake.<\/p>\n<p><\/p>\n<p>Tokrat bomo dodali knji\u017enico, ki se lahko kompajlira, ter se pogovorili o povezovanju modulov med seboj.<\/p>\n<p><\/p>\n<blockquote><p>Kot prej lahko tisti, ki ne morejo \u010dakati, takoj <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/izvolov\/mylib\">prejdite v posodobljeni repozitorij<\/a><\/noindex> in vse preizkusite sami.<\/p><\/blockquote>\n<p><noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><br \/>\n<noindex><a rel=\"nofollow\" name=\"contents\"><\/a><\/noindex><\/p>\n<h2>Vsebina<\/h2>\n<p><\/p>\n<ol>\n<li><noindex><a rel=\"nofollow\" href=\"#divide\">Razdeli<\/a><\/noindex><\/li>\n<li><noindex><a rel=\"nofollow\" href=\"#impera\">Obvladaj<\/a><\/noindex><\/li>\n<\/ol>\n<p>\n<noindex><a rel=\"nofollow\" name=\"divide\"><\/a><\/noindex><\/p>\n<h2><noindex><a rel=\"nofollow\" href=\"#contents\">Razdeli<\/a><\/noindex><\/h2>\n<p><\/p>\n<p>Prvo, kar moramo storiti za dosego na\u0161ega visokega cilja, je razdeliti razvijano programsko opremo na univerzalne izolirane bloke, enotne z vidika uporabnika.<\/p>\n<p><\/p>\n<p>V prvem delu je bil opisan tak standardni blok \u2014 projekt z glavno knji\u017enico. Zdaj bomo dodali v na\u0161 projekt knji\u017enico, ki se lahko kompajlira.<\/p>\n<p><\/p>\n<p>Zato bomo izvedbo funkcije <code>myfunc<\/code> preselili v lo\u010deno <code>.cpp<\/code>-datoteko:<\/p>\n<p><\/p>\n<pre><code class=\"diff\">diff --git a\/include\/mylib\/myfeature.hpp b\/include\/mylib\/myfeature.hpp\nindex 43db388..ba62b4f 100644\n--- a\/include\/mylib\/myfeature.hpp\n+++ b\/include\/mylib\/myfeature.hpp\n@@ -46,8 +46,5 @@ namespace mylib\n\n         ~  see mystruct\n      *\\\n-    inline bool myfunc (mystruct)\n-    {\n-        return true;\n-    }\n+    bool myfunc (mystruct);\n }\ndiff --git a\/src\/mylib\/myfeature.cpp b\/src\/mylib\/myfeature.cpp\nnew file mode 100644\nindex 0000000..abb5004\n--- \/dev\/null\n+++ b\/src\/mylib\/myfeature.cpp\n@@ -0,0 +1,9 @@\n+#include \n+\n+namespace mylib\n+{\n+    bool myfunc (mystruct)\n+    {\n+        return true;\n+    }\n+}<\/code><\/pre>\n<p><\/p>\n<p>Nato bomo definirali knji\u017enico, ki se lahko kompajlira (<code>myfeature<\/code>), ki bo sestavljena iz prej pridobljene <code>.cpp<\/code>-datoteke. Novi knji\u017enici so o\u010ditno potrebni obstoje\u010di naslovi, in da bi to zagotovili, jo lahko in moramo povezati z obstoje\u010do ciljno <code>mylib<\/code>. Povezava med njima je javna, kar pomeni, da bo vse, kar bo povezano s ciljem <code>myfeature<\/code>, samodejno pridobilo tudi cilj <code>mylib<\/code> (<noindex><a rel=\"nofollow\" href=\"https:\/\/cmake.org\/cmake\/help\/v3.14\/command\/target_link_libraries.html#libraries-for-a-target-and-or-its-dependents\">ve\u010d o na\u010dinih povezovanja<\/a><\/noindex>). <\/p>\n<p><\/p>\n<pre><code class=\"diff\">diff --git a\/CMakeLists.txt b\/CMakeLists.txt\nindex 108045c..0de77b8 100644\n--- a\/CMakeLists.txt\n+++ b\/CMakeLists.txt\n@@ -64,6 +64,17 @@ target_compile_features(mylib INTERFACE cxx_std_17)\n\n add_library(Mylib::mylib ALIAS mylib)\n\n+###################################################################################################\n+##\n+##      Knji\u017enica, ki se lahko kompajlira\n+##\n+###################################################################################################\n+\n+add_library(myfeature src\/mylib\/myfeature.cpp)\n+target_link_libraries(myfeature PUBLIC mylib)\n+\n+add_library(Mylib::myfeature ALIAS myfeature)\n+<\/code><\/pre>\n<p><\/p>\n<p>Nato bomo poskrbeli, da se bo nova knji\u017enica prav tako namestila v sistem:<\/p>\n<p><\/p>\n<pre><code class=\"diff\">@@ -72,7 +83,7 @@ add_library(Mylib::mylib ALIAS mylib)\n\n install(DIRECTORY include\/mylib DESTINATION include)\n\n-install(TARGETS mylib EXPORT MylibConfig)\n+install(TARGETS mylib myfeature EXPORT MylibConfig)\n install(EXPORT MylibConfig NAMESPACE Mylib:: DESTINATION share\/Mylib\/cmake)\n\n include(CMakePackageConfigHelpers)<\/code><\/pre>\n<p><\/p>\n<p>Pozoriti je treba, da je za cilj <code>myfeature<\/code>, as well as for <code>mylib<\/code> a pseudonym with a prefix was created <code>Mylib::<\/code>. The same is specified for both purposes when exporting them for installation in the system. This allows for consistent interaction with targets under any <noindex><a rel=\"nofollow\" href=\"#impera\">binding scheme<\/a><\/noindex>.<\/p>\n<p><\/p>\n<p>After that, it remains to run module tests with the new library (the function <code>myfunc<\/code> was moved from the header, so now it needs to be linked):<\/p>\n<p><\/p>\n<pre><code class=\"diff\">diff --git a\/test\/CMakeLists.txt b\/test\/CMakeLists.txt\nindex 5620be4..bc1266c 100644\n--- a\/test\/CMakeLists.txt\n+++ b\/test\/CMakeLists.txt\n@@ -4,7 +4,7 @@ add_executable(mylib-unit-tests test_main.cpp)\n target_sources(mylib-unit-tests PRIVATE mylib\/myfeature.cpp)\n target_link_libraries(mylib-unit-tests\n     PRIVATE\n-        Mylib::mylib\n+        Mylib::myfeature\n         doctest::doctest\n )<\/code><\/pre>\n<p><\/p>\n<p>Headers (<code>Mylib::mylib<\/code>) no longer need to be included separately, because, as mentioned, they are automatically included with the library (<code>Mylib::myfeature<\/code>).<\/p>\n<p><\/p>\n<p>And let's add a couple of nuances to ensure coverage measurements considering the newly arrived library:<\/p>\n<p><\/p>\n<pre><code class=\"diff\">@@ -15,11 +15,16 @@ if(MYLIB_COVERAGE AND GCOVR_EXECUTABLE)\n     target_compile_options(mylib-unit-tests PRIVATE --coverage)\n     target_link_libraries(mylib-unit-tests PRIVATE gcov)\n\n+    target_compile_options(myfeature PRIVATE --coverage)\n+    target_link_libraries(myfeature PRIVATE gcov)\n+\n     add_custom_target(coverage\n         COMMAND\n             ${GCOVR_EXECUTABLE}\n-                --root=${PROJECT_SOURCE_DIR}\/include\/\n-                --object-directory=${CMAKE_CURRENT_BINARY_DIR}\n+                --root=${PROJECT_SOURCE_DIR}\/\n+                --filter=${PROJECT_SOURCE_DIR}\/include\n+                --filter=${PROJECT_SOURCE_DIR}\/src\n+                --object-directory=${PROJECT_BINARY_DIR}\n         DEPENDS\n             check\n     )<\/code><\/pre>\n<p><\/p>\n<p>You can add more libraries, executables, etc. The specific way they are connected within the project doesn't matter. What matters is which targets serve as the interface of our module, that is, are exposed outward.<\/p>\n<p>\n<noindex><a rel=\"nofollow\" name=\"impera\"><\/a><\/noindex><\/p>\n<h2><noindex><a rel=\"nofollow\" href=\"#contents\">Obvladaj<\/a><\/noindex><\/h2>\n<p><\/p>\n<p>Now we have standard module blocks, and we can control them: forming structures of any complexity, installing them in the system or linking them together within a single build system.<\/p>\n<p><\/p>\n<h3 id=\"ustanovka-v-sistemu\">Installation in the system<\/h3>\n<p><\/p>\n<p>One of the options for using the module is to install our module in the system.<\/p>\n<p><\/p>\n<pre><code class=\"plaintext\">cmake --build path\/to\/build\/directory --target install<\/code><\/pre>\n<p><\/p>\n<p>After that, it connects in any other project using the command <noindex><a rel=\"nofollow\" href=\"https:\/\/cmake.org\/cmake\/help\/v3.14\/command\/find_package.html\"><code>find_package<\/code><\/a><\/noindex>.<\/p>\n<p><\/p>\n<pre><code class=\"cmake\">find_package(Mylib 1.0 REQUIRED)<\/code><\/pre>\n<p><\/p>\n<h3 id=\"podklyuchenie-v-kachestve-podmodulya\">Connecting as a submodule<\/h3>\n<p><\/p>\n<p>Another option is to connect the folder with our project to another project as a submodule using the command <noindex><a rel=\"nofollow\" href=\"https:\/\/cmake.org\/cmake\/help\/v3.14\/command\/add_subdirectory.html\"><code>add_subdirectory<\/code><\/a><\/noindex>.<\/p>\n<p><\/p>\n<h3 id=\"ispolzovanie\">Uporaba<\/h3>\n<p><\/p>\n<p>The binding methods vary, but the result is the same. In both cases, the project that uses our module will have access to the targets <code>Mylib::myfeature<\/code> in <code>Mylib::mylib<\/code>, ki se lahko uporabljajo, na primer, tako:<\/p>\n<p><\/p>\n<pre><code class=\"cmake\">add_executable(some_executable some.cpp sources.cpp)\ntarget_link_libraries(some_executable PRIVATE Mylib::myfeature)<\/code><\/pre>\n<p><\/p>\n<p>V na\u0161em primeru je knji\u017enica <code>Mylib::myfeature<\/code> potrebno vklju\u010diti takrat, ko se je treba povezati z knji\u017enico <code>libmyfeature<\/code>. \u010ce so dovolj glave, potem je bolje uporabiti knji\u017enico <code>Mylib::mylib<\/code>.<\/p>\n<p><\/p>\n<p>CMake cilji so lahko premeteni, na primer namenjeni samo za posredovanje dolo\u010denih lastnosti, odvisnosti itd. Pri tem se z njimi dela na enoten na\u010din.<\/p>\n<p><\/p>\n<p>Kar smo \u017eeleli dose\u010di.<\/p>\n<p>Izvor: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/463295\/\">habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0412 \u043f\u0440\u0435\u0434\u044b\u0434\u0443\u0449\u0435\u0439 \u0447\u0430\u0441\u0442\u0438 \u0434\u0430\u043d\u043d\u043e\u0433\u043e \u0437\u0430\u043d\u0438\u043c\u0430\u0442\u0435\u043b\u044c\u043d\u043e\u0433\u043e \u0440\u0430\u0441\u0441\u043a\u0430\u0437\u0430 \u0433\u043e\u0432\u043e\u0440\u0438\u043b\u043e\u0441\u044c \u043e\u0431 \u043e\u0440\u0433\u0430\u043d\u0438\u0437\u0430\u0446\u0438\u0438 \u0437\u0430\u0433\u043e\u043b\u043e\u0432\u043e\u0447\u043d\u043e\u0439 \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0438 \u0432 \u0440\u0430\u043c\u043a\u0430\u0445 \u0433\u0435\u043d\u0435\u0440\u0430\u0442\u043e\u0440\u0430 \u0441\u0438\u0441\u0442\u0435\u043c \u0441\u0431\u043e\u0440\u043a\u0438 CMake. \u0412 \u044d\u0442\u043e\u0442 \u0440\u0430\u0437 \u0434\u043e\u0431\u0430\u0432\u0438\u043c \u043a \u043d\u0435\u043c\u0443 \u043a\u043e\u043c\u043f\u0438\u043b\u0438\u0440\u0443\u0435\u043c\u0443\u044e \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0443, \u0430 \u0442\u0430\u043a\u0436\u0435 \u043f\u043e\u0433\u043e\u0432\u043e\u0440\u0438\u043c \u043e \u043a\u043e\u043c\u043f\u043e\u043d\u043e\u0432\u043a\u0435 \u043c\u043e\u0434\u0443\u043b\u0435\u0439 \u0434\u0440\u0443\u0433 \u0441 \u0434\u0440\u0443\u0433\u043e\u043c. \u041a\u0430\u043a \u0438 \u043f\u0440\u0435\u0436\u0434\u0435, \u0442\u0435\u043c, \u043a\u043e\u043c\u0443 \u043d\u0435 \u0442\u0435\u0440\u043f\u0438\u0442\u0441\u044f, \u043c\u043e\u0433\u0443\u0442 \u0441\u0440\u0430\u0437\u0443 \u043f\u0435\u0440\u0435\u0439\u0442\u0438 \u0432 \u043e\u0431\u043d\u043e\u0432\u043b\u0451\u043d\u043d\u044b\u0439 \u0440\u0435\u043f\u043e\u0437\u0438\u0442\u043e\u0440\u0438\u0439 \u0438 \u043f\u043e\u0442\u0440\u043e\u0433\u0430\u0442\u044c \u0432\u0441\u0451 \u0441\u0432\u043e\u0438\u043c\u0438 \u0440\u0443\u043a\u0430\u043c\u0438. \u0421\u043e\u0434\u0435\u0440\u0436\u0430\u043d\u0438\u0435 \u0420\u0430\u0437\u0434\u0435\u043b\u044f\u0439 \u0412\u043b\u0430\u0441\u0442\u0432\u0443\u0439 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":27802,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[688],"tags":[],"class_list":["post-37084","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-administrirovanie"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.5 - aioseo.com -->\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"Yuri 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