sanity check after toolset init

Author: henderkes

src/SPC/builder/linux/SystemUtil.php

@@ -8,6 +8,7 @@
 use SPC\exception\RuntimeException;
 use SPC\toolchain\ToolchainManager;
 use SPC\toolchain\ZigToolchain;
+use SPC\util\SPCTarget;
 
 class SystemUtil
 {
@@ -215,10 +216,12 @@ public static function getLibcVersionIfExists(?string $libc = null): ?string
             return null;
         }
         if ($libc === 'musl') {
-            if (self::isMuslDist()) {
+            if (SPCTarget::getLibc() === 'musl') {
                 $result = shell()->execWithResult('ldd 2>&1', false);
-            } else {
+            } elseif (is_file('/usr/local/musl/lib/libc.so')) {
                 $result = shell()->execWithResult('/usr/local/musl/lib/libc.so 2>&1', false);
+            } else {
+                $result = shell()->execWithResult('/lib/ld-musl-x86_64.so.1 2>&1', false);
             }
             // Match Version * line
             // match ldd version: "Version 1.2.3" match 1.2.3

src/SPC/toolchain/ToolchainManager.php

@@ -5,8 +5,10 @@
 namespace SPC\toolchain;
 
 use SPC\builder\linux\SystemUtil;
+use SPC\exception\RuntimeException;
 use SPC\exception\WrongUsageException;
 use SPC\util\GlobalEnvManager;
+use SPC\util\SPCTarget;
 
 class ToolchainManager
 {
@@ -47,7 +49,13 @@ public static function initToolchain(): void
     public static function afterInitToolchain(): void
     {
         if (!getenv('SPC_TOOLCHAIN')) {
-            throw new WrongUsageException('SPC_TOOLCHAIN not set');
+            throw new WrongUsageException('SPC_TOOLCHAIN was not properly set. Please contact the developers.');
+        }
+        if (SPCTarget::getLibc() === 'musl' && !SPCTarget::isStatic() && !file_exists('/lib/ld-musl-x86_64.so.1')) {
+            throw new RuntimeException('You are linking against musl libc dynamically, but musl libc is not installed. Please install it with `sudo dnf install musl-libc` or `sudo apt install musl`');
+        }
+        if (SPCTarget::getLibc() === 'glibc' && SystemUtil::isMuslDist()) {
+            throw new RuntimeException('You are linking against glibc libc dynamically, which is only supported on glibc distros.');
         }
         $toolchain = getenv('SPC_TOOLCHAIN');
         /* @var ToolchainInterface $toolchain */