b b but muh unit tests. the current braindead rust twats maintaining premake5 cant even target their own compiler backend. AuroraPipeline/Build#4 https://github.com/premake/premake-core/pull/1852

src/tools/gcc.lua

@@ -47,6 +47,29 @@
 -- Returns list of C compiler flags for a configuration.
 --
 	gcc.shared = {
+
+	}
+
+	gcc.cflags = {
+		cdialect = {
+			["C89"] = "-std=c89",
+			["C90"] = "-std=c90",
+			["C99"] = "-std=c99",
+			["C11"] = "-std=c11",
+			["C17"] = "-std=c17",
+			["gnu89"] = "-std=gnu89",
+			["gnu90"] = "-std=gnu90",
+			["gnu99"] = "-std=gnu99",
+			["gnu11"] = "-std=gnu11",
+			["gnu17"] = "-std=gnu17"
+		},
+		
+		visibility = {
+			Default = "-fvisibility=default",
+			Hidden = "-fvisibility=hidden",
+			Internal = "-fvisibility=internal",
+			Protected = "-fvisibility=protected",
+		},
 		architecture = {
 			x86 = "-m32",
 			x86_64 = "-m64",
@@ -139,21 +162,6 @@
 		}
 	}
 
-	gcc.cflags = {
-		cdialect = {
-			["C89"] = "-std=c89",
-			["C90"] = "-std=c90",
-			["C99"] = "-std=c99",
-			["C11"] = "-std=c11",
-			["C17"] = "-std=c17",
-			["gnu89"] = "-std=gnu89",
-			["gnu90"] = "-std=gnu90",
-			["gnu99"] = "-std=gnu99",
-			["gnu11"] = "-std=gnu11",
-			["gnu17"] = "-std=gnu17"
-		}
-	}
-
 	function gcc.getcflags(cfg)
 		local shared_flags = config.mapFlags(cfg, gcc.shared)
 		local cflags = config.mapFlags(cfg, gcc.cflags)
@@ -240,6 +248,96 @@
 		},
 		inlinesvisibility = {
 			Hidden = "-fvisibility-inlines-hidden"
+		},
+				architecture = {
+			x86 = "-m32",
+			x86_64 = "-m64",
+		},
+		flags = {
+			FatalCompileWarnings = "-Werror",
+			LinkTimeOptimization = "-flto",
+			ShadowedVariables = "-Wshadow",
+			UndefinedIdentifiers = "-Wundef",
+		},
+		floatingpoint = {
+			Fast = "-ffast-math",
+			Strict = "-ffloat-store",
+		},
+		strictaliasing = {
+			Off = "-fno-strict-aliasing",
+			Level1 = { "-fstrict-aliasing", "-Wstrict-aliasing=1" },
+			Level2 = { "-fstrict-aliasing", "-Wstrict-aliasing=2" },
+			Level3 = { "-fstrict-aliasing", "-Wstrict-aliasing=3" },
+		},
+		openmp = {
+			On = "-fopenmp"
+		},
+		optimize = {
+			Off = "-O0",
+			On = "-O2",
+			Debug = "-Og",
+			Full = "-O3",
+			Size = "-Os",
+			Speed = "-O3",
+		},
+		pic = {
+			On = "-fPIC",
+		},
+		vectorextensions = {
+			AVX = "-mavx",
+			AVX2 = "-mavx2",
+			SSE = "-msse",
+			SSE2 = "-msse2",
+			SSE3 = "-msse3",
+			SSSE3 = "-mssse3",
+			["SSE4.1"] = "-msse4.1",
+			["SSE4.2"] = "-msse4.2",
+		},
+		isaextensions = {
+			MOVBE = "-mmovbe",
+			POPCNT = "-mpopcnt",
+			PCLMUL = "-mpclmul",
+			LZCNT = "-mlzcnt",
+			BMI = "-mbmi",
+			BMI2 = "-mbmi2",
+			F16C = "-mf16c",
+			AES = "-maes",
+			FMA = "-mfma",
+			FMA4 = "-mfma4",
+			RDRND = "-mrdrnd",
+		},
+		warnings = {
+			Off = "-w",
+			High = "-Wall",
+			Extra = {"-Wall", "-Wextra"},
+			Everything = "-Weverything",
+		},
+		externalwarnings = {
+			Default = "-Wsystem-headers",
+			High = "-Wsystem-headers",
+			Extra = "-Wsystem-headers",
+			Everything = "-Wsystem-headers",
+		},
+		symbols = function(cfg, mappings)
+			local values = gcc.getdebugformat(cfg)
+			local debugformat = values[cfg.debugformat] or ""
+			return {
+				On       = "-g" .. debugformat,
+				FastLink = "-g" .. debugformat,
+				Full     = "-g" .. debugformat,
+			}
+		end,
+		unsignedchar = {
+			On = "-funsigned-char",
+			Off = "-fno-unsigned-char"
+		},
+		omitframepointer = {
+			On = "-fomit-frame-pointer",
+			Off = "-fno-omit-frame-pointer"
+		},
+		compileas = {
+			["Objective-C"] = "-x objective-c",
+			["Objective-C++"] = "-x objective-c++",
 		}
 	}