Cmake-boostrap is not finding proper compiler on system -> LLVM Clang cmake failind to build

[Behinder (behinder)]

Trying to build cmake I encountered lot of errors as the compiler was not able to find includes. I used ​https://cmichel.io/fixing-cpp-compilation-bugs-for-the-mac-os-catalina-upgrade/ trying to solve the problem and I added necessary paths however without llvm because I don't have it installed yet and I cannot install it because cmake build is failing.

I am attaching debug.log for reference. Key parts are IMO: ` cmake-bootstrap has no conflicts DEBUG: Executing org.macports.main (cmake-bootstrap) DEBUG: dropping privileges: euid changed to 502, egid changed to 501. DEBUG: Privilege de-escalation not attempted as not running as root. DEBUG: archivefetch phase started at Tue Oct 8 15:29:52 CEST 2024 ` how can I run something not as root if I did sudo? Misleading.. AND ` CMake 3.9.6, Copyright 2000-2017 Kitware, Inc. and Contributors C compiler on this system is: /usr/bin/clang -pipe -Os -isysroot/Library/Developer/CommandLineTools/SDKs/MacOSX14.sdk -arch arm64 -std=gnu11

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Error when bootstrapping CMake: Cannot find appropriate C++ compiler on this system. Please specify one using environment variable CXX. See cmake_bootstrap.log for compilers attempted. `

How can it not find proper C++ compiler on this system if in the log variable is set CXX='/usr/bin/clang++'

and clang++ --version gives: ` /usr/bin/clang++ --version Apple clang version 15.0.0 (clang-1500.3.9.4) Target: arm64-apple-darwin23.6.0 Thread model: posix InstalledDir: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin `

I set up MacPorts to always compile from source everything. And I was able to install few packages without problems. Here the list: apr @1.7.4_0 (active)

argon2 @20190702_1 (active) autoconf @2.72_0 (active) automake @1.17_0 (active) bison @3.8.2_2 (active) bison-runtime @3.8.2_0 (active) bzip2 @1.0.8_0 (active) cctools @949.0.1_3+xcode (active) clang_select @2.4_0 (active) curl-ca-bundle @8.10.1_0 (active) expat @2.6.3_0 (active) fzf @0.55.0_0 (active) gdbm @1.24_0 (active) gettext @0.22.5_0 (active) gettext-runtime @0.22.5_0 (active) gettext-tools-libs @0.22.5_0 (active) go @1.23.1_0 go @1.23.2_0 (active) gperf @3.1_0 (active) ld64 @3_6+ld64_xcode (active) ld64-xcode @2_6 (active) libcxx @5.0.1_5 (active) libedit @20240808-3.1_0 (active) libffi @3.4.6_1 (active) libiconv @1.17_0 (active) libtextstyle @0.22.5_0 (active) libtool @2.4.7_4 libtool @2.5.3_0 (active) llvm_select @2_1 (active) lzo2 @2.10_0 (active) m4 @1.4.19_1 (active) mhash @0.9.9.9_1 (active) nasm @2.16.03_0 (active) ncurses @6.5_0 (active) nghttp2 @1.63.0_0 (active) openssl @3_20 (active) openssl3 @3.3.2_0 (active) pcre2 @10.44_0 (active) php_select @1.0_1 (active) pkgconfig @0.29.2_0 (active) python3_select @0.1_0 (active) python3_select-312 @0.1_1 (active) python312 @3.12.6_0+lto+optimizations python312 @3.12.7_0+lto+optimizations (active) python_select @0.3_10 (active) python_select-312 @0.3_1 (active) readline @8.2.013_0 (active) sqlite3 @3.46.1_0 (active) vim @9.1.0000_0+huge (active) x264 @20191217_0 (active) xz @5.4.7_0 (active) zlib @1.3.1_0 (active) zsh @5.9_3 (active