dnl
dnl Compiler stuff for CUPS.
dnl
-dnl Copyright 2007-2017 by Apple Inc.
+dnl Copyright 2007-2020 by Apple Inc.
dnl Copyright 1997-2007 by Easy Software Products, all rights reserved.
dnl
dnl Licensed under Apache License v2.0. See the file "LICENSE" for more information.
dnl Clear the debugging and non-shared library options unless the user asks
dnl for them...
INSTALL_STRIP=""
-OPTIM=""
AC_SUBST(INSTALL_STRIP)
+
+AC_ARG_WITH(optim, [ --with-optim set optimization flags ],
+ OPTIM="$withval",
+ OPTIM="")
AC_SUBST(OPTIM)
-AC_ARG_WITH(optim, [ --with-optim set optimization flags ])
AC_ARG_ENABLE(debug, [ --enable-debug build with debugging symbols])
AC_ARG_ENABLE(debug_guards, [ --enable-debug-guards build with memory allocation guards])
AC_ARG_ENABLE(debug_printfs, [ --enable-debug-printfs build with CUPS_DEBUG_LOG support])
AC_ARG_ENABLE(unit_tests, [ --enable-unit-tests build and run unit tests])
dnl For debugging, keep symbols, otherwise strip them...
-if test x$enable_debug = xyes; then
+if test x$enable_debug = xyes -a "x$OPTIM" = x; then
OPTIM="-g"
else
INSTALL_STRIP="-s"
dnl Read-only data/program support on Linux...
AC_ARG_ENABLE(relro, [ --enable-relro build with the GCC relro option])
+dnl Clang/GCC address sanitizer...
+AC_ARG_ENABLE(sanitizer, [ --enable-sanitizer build with AddressSanitizer])
+
dnl Update compiler options...
CXXLIBS="${CXXLIBS:=}"
AC_SUBST(CXXLIBS)
RELROFLAGS=""
AC_SUBST(RELROFLAGS)
+WARNING_OPTIONS=""
+AC_SUBST(WARNING_OPTIONS)
+
if test -n "$GCC"; then
# Add GCC-specific compiler options...
+
+ # Address sanitizer is a useful tool to use when developing/debugging
+ # code but adds about 2x overhead...
+ if test x$enable_sanitizer = xyes; then
+ # Use -fsanitize=address with debugging...
+ OPTIM="$OPTIM -g -fsanitize=address"
+ else
+ # Otherwise use the Fortify enhancements to catch any unbounded
+ # string operations...
+ CFLAGS="$CFLAGS -D_FORTIFY_SOURCE=2"
+ CXXFLAGS="$CXXFLAGS -D_FORTIFY_SOURCE=2"
+ fi
+
+ # Default optimization options...
if test -z "$OPTIM"; then
- if test "x$with_optim" = x; then
- # Default to optimize-for-size and debug
- OPTIM="-Os -g"
- else
- OPTIM="$with_optim $OPTIM"
- fi
+ # Default to optimize-for-size and debug
+ OPTIM="-Os -g"
fi
# Generate position-independent code as needed...
CFLAGS="$OLDCFLAGS"
fi
- if test "x$with_optim" = x; then
- # Add useful warning options for tracking down problems...
- OPTIM="-Wall -Wno-format-y2k -Wunused $OPTIM"
-
- AC_MSG_CHECKING(whether compiler supports -Wno-unused-result)
- OLDCFLAGS="$CFLAGS"
- CFLAGS="$CFLAGS -Werror -Wno-unused-result"
- AC_TRY_COMPILE(,,
- [OPTIM="$OPTIM -Wno-unused-result"
- AC_MSG_RESULT(yes)],
- AC_MSG_RESULT(no))
- CFLAGS="$OLDCFLAGS"
-
- AC_MSG_CHECKING(whether compiler supports -Wsign-conversion)
- OLDCFLAGS="$CFLAGS"
- CFLAGS="$CFLAGS -Werror -Wsign-conversion"
- AC_TRY_COMPILE(,,
- [OPTIM="$OPTIM -Wsign-conversion"
- AC_MSG_RESULT(yes)],
- AC_MSG_RESULT(no))
- CFLAGS="$OLDCFLAGS"
-
- AC_MSG_CHECKING(whether compiler supports -Wno-tautological-compare)
- OLDCFLAGS="$CFLAGS"
- CFLAGS="$CFLAGS -Werror -Wno-tautological-compare"
- AC_TRY_COMPILE(,,
- [OPTIM="$OPTIM -Wno-tautological-compare"
- AC_MSG_RESULT(yes)],
- AC_MSG_RESULT(no))
- CFLAGS="$OLDCFLAGS"
-
- # Additional warning options for development testing...
- if test -d .git; then
- OPTIM="-Werror $OPTIM"
- fi
- fi
-
- case "$host_os_name" in
- darwin*)
- # -D_FORTIFY_SOURCE=2 adds additional object size
- # checking, basically wrapping all string functions
- # with buffer-limited ones. Not strictly needed for
- # CUPS since we already use buffer-limited calls, but
- # this will catch any additions that are broken.
- CFLAGS="$CFLAGS -D_FORTIFY_SOURCE=2"
- ;;
+ # Add useful warning options for tracking down problems...
+ WARNING_OPTIONS="-Wall -Wno-format-y2k -Wunused -Wno-unused-result -Wsign-conversion -Wno-unused-but-set-variable -Wno-unused-variable"
- linux*)
- # The -z relro option is provided by the Linux linker command to
- # make relocatable data read-only.
- if test x$enable_relro = xyes; then
- RELROFLAGS="-Wl,-z,relro,-z,now"
- fi
+ # Test GCC version for certain warning flags since -Werror
+ # doesn't trigger...
+ gccversion=`$CC --version | head -1 | awk '{print $NF}'`
+ case "$gccversion" in
+ 7.* | 8.* | 9.*)
+ WARNING_OPTIONS="$WARNING_OPTIONS -Wno-format-truncation -Wno-tautological-compare"
;;
esac
+
+ # Additional warning options for development testing...
+ if test -d .git; then
+ WARNING_OPTIONS="-Werror -Wno-error=deprecated-declarations -Wno-unknown-warning-option $WARNING_OPTIONS"
+ fi
else
# Add vendor-specific compiler options...
case $host_os_name in
sunos*)
# Solaris
if test -z "$OPTIM"; then
- if test "x$with_optim" = x; then
- OPTIM="-xO2"
- else
- OPTIM="$with_optim $OPTIM"
- fi
+ OPTIM="-xO2"
fi
if test $PICFLAG = 1; then
fi
;;
*)
- # Running some other operating system; inform the user they
- # should contribute the necessary options to
- # cups-support@cups.org...
- echo "Building CUPS with default compiler optimizations; contact"
- echo "cups-devel@cups.org with uname and compiler options needed"
- echo "for your platform, or set the CFLAGS and LDFLAGS environment"
- echo "variables before running configure."
+ # Running some other operating system; inform the user
+ # they should contribute the necessary options via
+ # Github...
+ echo "Building CUPS with default compiler optimizations; contact the CUPS developers on Github"
+ echo "(https://github.com/apple/cups/issues) with the uname and compiler options needed for"
+ echo "your platform, or set the CFLAGS and LDFLAGS environment variables before running"
+ echo "configure."
;;
esac
fi
# glibc 2.8 and higher breaks peer credentials unless you
# define _GNU_SOURCE...
OPTIM="$OPTIM -D_GNU_SOURCE"
+
+ # The -z relro option is provided by the Linux linker command to
+ # make relocatable data read-only.
+ if test x$enable_relro = xyes; then
+ RELROFLAGS="-Wl,-z,relro,-z,now"
+ fi
;;
esac
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