diff --git a/cpdebug.mk b/cpdebug.mk
index 6baedf227..75f08c66f 100644
--- a/cpdebug.mk
+++ b/cpdebug.mk
@@ -3,12 +3,12 @@ ifdef ComSpec
 COMSPEC=$(ComSpec)
 endif
 ifdef COMSPEC
-OBJCOPY=objcopy.exe
-OBJDUMP=objdump.exe
+OBJCOPY?=objcopy.exe
+OBJDUMP?=objdump.exe
 GZIP?=gzip.exe
 else
-OBJCOPY=objcopy
-OBJDUMP=objdump
+OBJCOPY?=objcopy
+OBJDUMP?=objdump
 GZIP?=gzip
 endif
 DBGNAME=$(BIN).debug
diff --git a/src/Makefile b/src/Makefile
index c12581bbf..6bbcdbe25 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -144,9 +144,9 @@ endif
 
 OBJDUMP_OPTS?=--wide --source --line-numbers
 
-OBJCOPY:=$(call Prefix,objcopy)
-OBJDUMP:=$(call Prefix,objdump)
-WINDRES:=$(call Prefix,windres)
+OBJCOPY?=$(call Prefix,objcopy)
+OBJDUMP?=$(call Prefix,objdump)
+WINDRES?=$(call Prefix,windres)
 
 ifdef YASM
 NASM?=yasm
diff --git a/src/Makefile.d/detect.mk b/src/Makefile.d/detect.mk
index f458b044c..9a1124278 100644
--- a/src/Makefile.d/detect.mk
+++ b/src/Makefile.d/detect.mk
@@ -57,15 +57,19 @@ endif
 
 # This must have high to low order.
 gcc_versions:=\
-	102 101\
-	93 92 91\
-	84 83 82 81\
-	75 74 73 72 71\
-	64 63 62 61\
-	55 54 53 52 51\
+	142 141 140\
+	132 131 130\
+	123 122 121 120\
+	114 113 112 111 110\
+	105 104 103 102 101 100\
+	95 94 93 92 91 90\
+	85 84 83 82 81 80\
+	75 74 73 72 71 70\
+	64 63 62 61 60\
+	55 54 53 52 51 50\
 	49 48 47 46 45 44 43 42 41 40
 
-latest_gcc_version:=10.2
+latest_gcc_version:=14.2.1
 
 # Automatically set version flag, but not if one was
 # manually set. And don't bother if this is a clean only
@@ -75,13 +79,18 @@ ifeq (,$(call Wildvar,GCC% destructive))
 # can't use $(CC) --version here since that uses argv[0] to display the name
 # also gcc outputs the information to stderr, so I had to do 2>&1
 # this program really doesn't like identifying itself
-version:=$(shell $(CC) -v 2>&1)
+shellversion:=$(shell $(CC) -v 2>&1)
+# Try to remove "-win32"
+version:=$(subst -win32,.0,$(shellversion))
 
 # check if this is in fact GCC
 ifneq (,$(findstring gcc version,$(version)))
 
 # in stark contrast to the name, gcc will give me a nicely formatted version number for free
-version:=$(shell $(CC) -dumpfullversion)
+shellversion:=$(shell $(CC) -dumpfullversion)
+
+# Try to remove "-win32"
+version:=$(subst -win32,.0,$(shellversion))
 
 # Turn version into words of major, minor
 v:=$(subst ., ,$(version))
diff --git a/src/Makefile.d/features.mk b/src/Makefile.d/features.mk
index c9a81fcfa..eec507156 100644
--- a/src/Makefile.d/features.mk
+++ b/src/Makefile.d/features.mk
@@ -41,7 +41,7 @@ $(eval $(call Configure,PNG,$(PNG_CONFIG) \
 	$(if $(PNG_STATIC),--static),,--ldflags))
 endif
 ifdef LINUX
-opts+=-D_LARGFILE64_SOURCE
+opts+=-D_LARGEFILE64_SOURCE
 endif
 opts+=-DHAVE_PNG
 sources+=apng.c