From a18d9269a516c5f8149b04ccb01034960f4851d8 Mon Sep 17 00:00:00 2001
From: Alex Shabalin <alex.shabalin@tweag.io>
Date: Fri, 19 Nov 2021 15:22:31 +0100
Subject: [PATCH] Fix build warnings on MacOS

---
 src/libstore/build/local-derivation-goal.cc | 5 ++++-
 src/libstore/gc.cc                          | 2 ++
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/libstore/build/local-derivation-goal.cc b/src/libstore/build/local-derivation-goal.cc
index 3c7bd695e..c9a4a31e7 100644
--- a/src/libstore/build/local-derivation-goal.cc
+++ b/src/libstore/build/local-derivation-goal.cc
@@ -342,7 +342,7 @@ int childEntry(void * arg)
     return 1;
 }
 
-
+#if __linux__
 static void linkOrCopy(const Path & from, const Path & to)
 {
     if (link(from.c_str(), to.c_str()) == -1) {
@@ -358,6 +358,7 @@ static void linkOrCopy(const Path & from, const Path & to)
         copyPath(from, to);
     }
 }
+#endif
 
 
 void LocalDerivationGoal::startBuilder()
@@ -917,7 +918,9 @@ void LocalDerivationGoal::startBuilder()
     } else
 #endif
     {
+#if __linux__
     fallback:
+#endif
         pid = startProcess([&]() {
             runChild();
         });
diff --git a/src/libstore/gc.cc b/src/libstore/gc.cc
index 8030c84f5..29d45e067 100644
--- a/src/libstore/gc.cc
+++ b/src/libstore/gc.cc
@@ -324,6 +324,7 @@ static string quoteRegexChars(const string & raw)
     return std::regex_replace(raw, specialRegex, R"(\$&)");
 }
 
+#if defined(__linux__)
 static void readFileRoots(const char * path, UncheckedRoots & roots)
 {
     try {
@@ -333,6 +334,7 @@ static void readFileRoots(const char * path, UncheckedRoots & roots)
             throw;
     }
 }
+#endif
 
 void LocalStore::findRuntimeRoots(Roots & roots, bool censor)
 {