<html><head><meta http-equiv="Content-Type" content="text/html; charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><br class=""><div><br class=""><blockquote type="cite" class=""><div class="">On Nov 11, 2018, at 3:07 PM, Perry E. Metzger <<a href="mailto:pmetzger@macports.org" class="">pmetzger@macports.org</a>> wrote:</div><div class=""><div class=""><br class=""></div></div></blockquote><br class=""><blockquote type="cite" class=""><div class=""><div class="">No, that works if <myheader.h> is in the system includes path, and<br class="">that's standards conformant.<br class=""></div></div></blockquote></div><div class=""><br class=""></div><div class=""><br class=""><div class="">What I know about this, no doubt incomplete, comes from here:</div><div class=""><br class=""></div><div class=""><a href="https://developer.apple.com/documentation/xcode_release_notes/xcode_10_release_notes/build_system_release_notes_for_xcode_10" class="">https://developer.apple.com/documentation/xcode_release_notes/xcode_10_release_notes/build_system_release_notes_for_xcode_10</a></div><div class=""><ul style="box-sizing: inherit; margin: 0.7em 0px 0px 2rem; padding: 0px; caret-color: rgb(51, 51, 51); color: rgb(51, 51, 51); font-family: "SF Pro Text", "SF Pro Icons", "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 17px; letter-spacing: -0.3569999933242798px;" class=""><li style="box-sizing: inherit; margin: 0.7em 0px 0px; padding: 0px;" class=""><div style="box-sizing: inherit; margin: 0px; padding: 0px;" class="">The legacy header map that was generated when the Always Search User Paths (<code class="code-voice" style="box-sizing: inherit; font-size: 1em; font-family: "SF Mono", Menlo, monospace; letter-spacing: 0px;">ALWAYS<wbr style="box-sizing: inherit;" class="">_SEARCH<wbr style="box-sizing: inherit;" class="">_USER<wbr style="box-sizing: inherit;" class="">_PATHS</code>) setting was <code class="code-voice" style="box-sizing: inherit; font-size: 1em; font-family: "SF Mono", Menlo, monospace; letter-spacing: 0px;">YES</code> is not supported by the new build system. Instead, set <code class="code-voice" style="box-sizing: inherit; font-size: 1em; font-family: "SF Mono", Menlo, monospace; letter-spacing: 0px;">ALWAYS<wbr style="box-sizing: inherit;" class="">_SEARCH<wbr style="box-sizing: inherit;" class="">_USER<wbr style="box-sizing: inherit;" class="">_PATHS</code> to <code class="code-voice" style="box-sizing: inherit; font-size: 1em; font-family: "SF Mono", Menlo, monospace; letter-spacing: 0px;">NO</code> and migrate to using modern header include syntax. Add any needed header files that are in the project repository to the Xcode project to ensure they are available for use in #include (via the project wide header map). Use quote-style include (<code class="code-voice" style="box-sizing: inherit; font-size: 1em; font-family: "SF Mono", Menlo, monospace; letter-spacing: 0px;">"example<wbr style="box-sizing: inherit;" class="">.h"</code>) for project headers, and reserve angle-bracket include (<code class="code-voice" style="box-sizing: inherit; font-size: 1em; font-family: "SF Mono", Menlo, monospace; letter-spacing: 0px;"><example<wbr style="box-sizing: inherit;" class="">.h></code>) for system headers.</div></li></ul><div class=""><br class=""></div></div></div></body></html>