--- a/GPL/nativeBuildProperties.gradle
+++ b/GPL/nativeBuildProperties.gradle
@@ -40,2 +40,11 @@
 	toolChains {
+		withType(GccCompatibleToolChain) {
+			if (System.getenv("GENTOO_CC")) {
+				eachPlatform {
+					cCompiler.executable = System.getenv("GENTOO_CC")
+					cppCompiler.executable = System.getenv("GENTOO_CXX")
+					linker.executable = System.getenv("GENTOO_CXX")
+				}
+			}
+		}
 		def current = getCurrentPlatformName()
--- a/GPL/DemanglerGnu/build.gradle
+++ b/GPL/DemanglerGnu/build.gradle
@@ -176,2 +176,5 @@
 			
+			b.cCompiler.args(*(System.getenv("CPPFLAGS") ?: "").tokenize())
+			b.cCompiler.args(*(System.getenv("CFLAGS") ?: "").tokenize())
+			b.linker.args(*(System.getenv("LDFLAGS") ?: "").tokenize())
 		}
--- a/Ghidra/Features/Decompiler/buildNatives.gradle
+++ b/Ghidra/Features/Decompiler/buildNatives.gradle
@@ -204,8 +204,2 @@
 				
-				c {
-					source {
-						srcDir "src/decompile/zlib"
-						include "*.c"
-					}
-				}
 			} // end sources (sleigh)
@@ -214,4 +208,4 @@
 				all{ b ->
-					b.cppCompiler.define "LOCAL_ZLIB"
-					b.cCompiler.define "NO_GZIP"
+					b.cppCompiler.args(*(System.getenv("ZLIB_CFLAGS") ?: "").tokenize())
+					b.linker.args(*(System.getenv("ZLIB_LIBS") ?: "").tokenize())
 				}
@@ -277,2 +271,7 @@
 			}
+			b.cCompiler.args(*(System.getenv("CPPFLAGS") ?: "").tokenize())
+			b.cCompiler.args(*(System.getenv("CFLAGS") ?: "").tokenize())
+			b.cppCompiler.args(*(System.getenv("CPPFLAGS") ?: "").tokenize())
+			b.cppCompiler.args(*(System.getenv("CXXFLAGS") ?: "").tokenize())
+			b.linker.args(*(System.getenv("LDFLAGS") ?: "").tokenize())
 		}
--- a/Ghidra/Features/FileFormats/buildNatives.gradle
+++ b/Ghidra/Features/FileFormats/buildNatives.gradle
@@ -91,2 +91,5 @@
 			}
+			b.cCompiler.args(*(System.getenv("CPPFLAGS") ?: "").tokenize())
+			b.cCompiler.args(*(System.getenv("CFLAGS") ?: "").tokenize())
+			b.linker.args(*(System.getenv("LDFLAGS") ?: "").tokenize())
 		}