{"id":13039,"date":"2021-04-24T13:34:58","date_gmt":"2021-04-24T18:34:58","guid":{"rendered":"https:\/\/rud.is\/b\/?p=13039"},"modified":"2021-04-24T13:36:15","modified_gmt":"2021-04-24T18:36:15","slug":"making-macos-universal-apps-with-universal-golang-static-libraries","status":"publish","type":"post","link":"https:\/\/rud.is\/b\/2021\/04\/24\/making-macos-universal-apps-with-universal-golang-static-libraries\/","title":{"rendered":"Making macOS Universal Apps in Swift with Universal Golang Static Libraries"},"content":{"rendered":"<p>There are a plethora of amazingly useful Golang libraries, and it has been possible for quite some time to use Go libraries with Swift. The advent of the release of the new Apple Silicon\/M1\/arm64 architecture for macOS created the need for a new round of &#8220;fat&#8221;\/&#8221;universal&#8221; binaries and libraries to bridge the gap between legacy Intel Macs and the new breed of Macs.<\/p>\n<p>I didn&#8217;t see an &#8220;all-in-one-place&#8221; snippet for how to build cross-platform + fat\/universal Golang static libraries and then use them in Swift to make a fat\/universal macOS binary, and it is likely I&#8217;m not the only one who wished this existed, so here&#8217;s a snippet that takes the static HTML library example from <a href=\"https:\/\/youngdynasty.net\/posts\/writing-mac-apps-in-go\/\">Young Dynasty<\/a> and shows how to prepare the static library for use in Swift, then how to build a Swift universal binary. This is a command line app and we&#8217;re building everything without the Xcode editor to keep it concise and straightforward.<\/p>\n<p>The rest of the explanatory text is in the comments in the code block.<\/p>\n<pre><code class=\"language-bash\"># make a space to play in\nmkdir universal-static-test\ncd universal-static-test\n\n# libhtmlscraper via: https:\/\/youngdynasty.net\/posts\/writing-mac-apps-in-go\/\n# make the small HTML escaper library Golang source\ncat &gt; main.go &lt;&lt; EOF\npackage main\n\nimport (\n  \"C\"\n  \"html\"\n)\n\n\/\/export escape_html\nfunc escape_html(input *C.char) *C.char {\n  s := html.EscapeString(C.GoString(input))\n  return C.CString(s)\n}\n\n\/\/export unescape_html\nfunc unescape_html(input *C.char) *C.char {\n  s := html.UnescapeString(C.GoString(input))\n  return C.CString(s)\n}\n\n\/\/ We need an entry point; it's ok for this to be empty\nfunc main() {}\nEOF\n\n# build the Go library for ARM\nCGO_ENABLED=1 GOOS=darwin GOARCH=arm64 go build --buildmode=c-archive -o libhtmlescaper-arm64.a\n\n# build the Go library for AMD\nCGO_ENABLED=1 GOOS=darwin GOARCH=amd64 go build --buildmode=c-archive -o libhtmlescaper-amd64.a\n\n# Make a universal static archive\nlipo -create libhtmlescaper-arm64.a libhtmlescaper-amd64.a -o libhtmlescaper.a\n\n# we don't need this anymore\nrm libhtmlescaper-amd64.h\n\n# this is a better name\nmv libhtmlescaper-arm64.h libhtmlescaper.h\n\n# make the objective-c bridging header so we can use the library in Swift\ncat &gt; bridge.h &lt;&lt;EOF\n#include \"libhtmlescaler.h\"\nEOF\n\n# creaate a lame\/super basic test swift file that uses the Go library\ncat &gt; main.swift &lt;&lt;EOF\nprint(String(cString: escape_html(strdup(\"&lt;b&gt;bold&lt;\/b&gt;\"))))\nEOF\n\n# make the swift executatble for amd64\nswiftc -target x86_64-apple-macos11.0 -import-objc-header bridge.h main.swift libhtmlescaper.a -o main-amd64\n\n# make the swift executatble for arm64\nswiftc -target arm64-apple-macos11.0 -import-objc-header bridge.h main.swift libhtmlescaper.a -o main-arm64 \n\n# Make a universal binary\nlipo -create main-amd64 main-arm64 -o main\n\n# Make sure it's universal\nfile main\n## main: Mach-O universal binary with 2 architectures: [x86_64:Mach-O 64-bit executable x86_64] [arm64]\n## main (for architecture x86_64): Mach-O 64-bit executable x86_64\n## main (for architecture arm64):  Mach-O 64-bit executable arm64\n\n# try it out\n.\/main.swift\n## \"&lt;b&gt;bold&lt;\/b&gt;\"\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>There are a plethora of amazingly useful Golang libraries, and it has been possible for quite some time to use Go libraries with Swift. The advent of the release of the new Apple Silicon\/M1\/arm64 architecture for macOS created the need for a new round of &#8220;fat&#8221;\/&#8221;universal&#8221; binaries and libraries to bridge the gap between legacy [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"activitypub_content_warning":"","activitypub_content_visibility":"","activitypub_max_image_attachments":3,"activitypub_interaction_policy_quote":"anyone","activitypub_status":"","footnotes":""},"categories":[840,841,780,830],"tags":[],"class_list":["post-13039","post","type-post","status-publish","format-standard","hentry","category-go","category-golang","category-macos","category-swift"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Making macOS Universal Apps in Swift with Universal Golang Static Libraries - rud.is<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/rud.is\/b\/2021\/04\/24\/making-macos-universal-apps-with-universal-golang-static-libraries\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Making macOS Universal Apps in Swift with Universal Golang Static Libraries - rud.is\" \/>\n<meta property=\"og:description\" content=\"There are a plethora of amazingly useful Golang libraries, and it has been possible for quite some time to use Go libraries with Swift. The advent of the release of the new Apple Silicon\/M1\/arm64 architecture for macOS created the need for a new round of &#8220;fat&#8221;\/&#8221;universal&#8221; binaries and libraries to bridge the gap between legacy [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/rud.is\/b\/2021\/04\/24\/making-macos-universal-apps-with-universal-golang-static-libraries\/\" \/>\n<meta property=\"og:site_name\" content=\"rud.is\" \/>\n<meta property=\"article:published_time\" content=\"2021-04-24T18:34:58+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2021-04-24T18:36:15+00:00\" \/>\n<meta name=\"author\" content=\"hrbrmstr\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"hrbrmstr\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/rud.is\\\/b\\\/2021\\\/04\\\/24\\\/making-macos-universal-apps-with-universal-golang-static-libraries\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/rud.is\\\/b\\\/2021\\\/04\\\/24\\\/making-macos-universal-apps-with-universal-golang-static-libraries\\\/\"},\"author\":{\"name\":\"hrbrmstr\",\"@id\":\"https:\\\/\\\/rud.is\\\/b\\\/#\\\/schema\\\/person\\\/d7cb7487ab0527447f7fda5c423ff886\"},\"headline\":\"Making macOS Universal Apps in Swift with Universal Golang Static Libraries\",\"datePublished\":\"2021-04-24T18:34:58+00:00\",\"dateModified\":\"2021-04-24T18:36:15+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/rud.is\\\/b\\\/2021\\\/04\\\/24\\\/making-macos-universal-apps-with-universal-golang-static-libraries\\\/\"},\"wordCount\":191,\"commentCount\":1,\"publisher\":{\"@id\":\"https:\\\/\\\/rud.is\\\/b\\\/#\\\/schema\\\/person\\\/d7cb7487ab0527447f7fda5c423ff886\"},\"articleSection\":[\"Go\",\"Golang\",\"macOS\",\"Swift\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/rud.is\\\/b\\\/2021\\\/04\\\/24\\\/making-macos-universal-apps-with-universal-golang-static-libraries\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/rud.is\\\/b\\\/2021\\\/04\\\/24\\\/making-macos-universal-apps-with-universal-golang-static-libraries\\\/\",\"url\":\"https:\\\/\\\/rud.is\\\/b\\\/2021\\\/04\\\/24\\\/making-macos-universal-apps-with-universal-golang-static-libraries\\\/\",\"name\":\"Making macOS Universal Apps in Swift with Universal Golang Static Libraries - rud.is\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/rud.is\\\/b\\\/#website\"},\"datePublished\":\"2021-04-24T18:34:58+00:00\",\"dateModified\":\"2021-04-24T18:36:15+00:00\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/rud.is\\\/b\\\/2021\\\/04\\\/24\\\/making-macos-universal-apps-with-universal-golang-static-libraries\\\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/rud.is\\\/b\\\/2021\\\/04\\\/24\\\/making-macos-universal-apps-with-universal-golang-static-libraries\\\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/rud.is\\\/b\\\/2021\\\/04\\\/24\\\/making-macos-universal-apps-with-universal-golang-static-libraries\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/rud.is\\\/b\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Making macOS Universal Apps in Swift with Universal Golang Static Libraries\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/rud.is\\\/b\\\/#website\",\"url\":\"https:\\\/\\\/rud.is\\\/b\\\/\",\"name\":\"rud.is\",\"description\":\"&quot;In God we trust. 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Setup was quick, but the sensor package died within 24 hours. I was going to give up on it but I had written an R package (for the REST API & UDP broadcast interfaces) and C++ utility\u2026","rel":"","context":"In &quot;C++&quot;","block_context":{"text":"C++","link":"https:\/\/rud.is\/b\/category\/c\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":14475,"url":"https:\/\/rud.is\/b\/2023\/09\/30\/avoid-libwebp-electron-woes-on-macos-with-positron\/","url_meta":{"origin":13039,"position":1},"title":"Avoid libwebp Electron Woes On macOS With positron","author":"hrbrmstr","date":"2023-09-30","format":false,"excerpt":"If you've got ? on this blog (directly, or via syndication) you'd have to have been living under a rock to not know about the libwebp supply chain disaster. 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They've replaced it with WeatherKit, which has both an xOS framework version as well as a REST API. 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