opts

Makefile

@@ -5,10 +5,14 @@
 # single-header nlohmann/json.hpp (no extra dependency).
 # If your headers/libs live in a non-standard prefix, override, e.g.:
 #   make CPPFLAGS="-I/opt/include" LDLIBS="-L/opt/lib -lcurl -lreadline"
+#
+# 32-bit build: make 32bit
+# Or: make CXXFLAGS="-m32" LDFLAGS="-m32"
+# Large file support on 32-bit: make CPPFLAGS="-D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE"
 
 CXX = c++
 CXXFLAGS = -std=c++20 -Wall -Wextra -Wpedantic -O1 -D_POSIX_C_SOURCE=200809L -D_DEFAULT_SOURCE
-CPPFLAGS = -I/usr/local/include -I.
+CPPFLAGS = -I/usr/local/include -I. -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
 LDLIBS = -L/usr/local/lib -lcurl -lreadline
 
 # Location of the AddressSanitizer/UBSan runtime libraries plus a replacement
@@ -61,3 +65,11 @@ install: bantam
 # the replacement libasan_preinit.o, and sets an rpath so they load at run time.
 debug:
 	$(MAKE) CXXFLAGS="$(CXXFLAGS) -g -O0 -fsanitize=address,undefined -B$(ASANDIR) -Wl,-rpath,$(ASANDIR)" bantam
+
+# 32-bit build target
+# Usage: make 32bit
+# This builds a 32-bit binary with large file support enabled.
+32bit:
+	$(MAKE) CXXFLAGS="$(CXXFLAGS) -m32" LDFLAGS="-m32" bantam
+
+.PHONY: clean install debug 32bit