dnl
-dnl "$Id: cups-compiler.m4 7871 2008-08-27 21:12:43Z mike $"
+dnl Compiler stuff for CUPS.
dnl
-dnl Compiler stuff for CUPS.
+dnl Copyright 2007-2018 by Apple Inc.
+dnl Copyright 1997-2007 by Easy Software Products, all rights reserved.
dnl
-dnl Copyright 2007-2013 by Apple Inc.
-dnl Copyright 1997-2007 by Easy Software Products, all rights reserved.
-dnl
-dnl These coded instructions, statements, and computer programs are the
-dnl property of Apple Inc. and are protected by Federal copyright
-dnl law. Distribution and use rights are outlined in the file "LICENSE.txt"
-dnl which should have been included with this file. If this file is
-dnl file is missing or damaged, see the license at "http://www.cups.org/".
+dnl Licensed under Apache License v2.0. See the file "LICENSE" for more information.
dnl
dnl Clear the debugging and non-shared library options unless the user asks
dnl for them...
INSTALL_STRIP=""
-OPTIM=""
AC_SUBST(INSTALL_STRIP)
+
+AC_ARG_WITH(optim, [ --with-optim set optimization flags ],
+ OPTIM="$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$OPTIM" = x; then
OPTIM="-g"
else
INSTALL_STRIP="-s"
dnl Unit tests take up time during a compile...
if test x$enable_unit_tests = xyes; then
+ if test "$build" != "$host"; then
+ AC_MSG_ERROR([Sorry, cannot build unit tests when cross-compiling.])
+ fi
+
UNITTESTS="unittests"
else
UNITTESTS=""
fi
if test -z "$with_ldarchflags"; then
- if test "$uname" = Darwin; then
+ if test "$host_os_name" = darwin; then
# Only create Intel programs by default
LDARCHFLAGS="`echo $ARCHFLAGS | sed -e '1,$s/-arch ppc64//'`"
else
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...
- if test $PICFLAG = 1 -a $uname != AIX; then
+ if test $PICFLAG = 1; then
OPTIM="-fPIC $OPTIM"
fi
# The -fstack-protector option is available with some versions of
# GCC and adds "stack canaries" which detect when the return address
# has been overwritten, preventing many types of exploit attacks.
- AC_MSG_CHECKING(if GCC supports -fstack-protector)
+ AC_MSG_CHECKING(whether compiler supports -fstack-protector)
OLDCFLAGS="$CFLAGS"
CFLAGS="$CFLAGS -fstack-protector"
AC_TRY_LINK(,,
# exploits that depend on a fixed address for common functions.
#
# Not available to LSB binaries...
- AC_MSG_CHECKING(if GCC supports -fPIE)
+ AC_MSG_CHECKING(whether compiler supports -fPIE)
OLDCFLAGS="$CFLAGS"
- CFLAGS="$CFLAGS -fPIE -pie"
- AC_TRY_COMPILE(,,[
- PIEFLAGS="-fPIE -pie"
- AC_MSG_RESULT(yes)],
- AC_MSG_RESULT(no))
+ case "$host_os_name" in
+ darwin*)
+ CFLAGS="$CFLAGS -fPIE -Wl,-pie"
+ AC_TRY_COMPILE(,,[
+ PIEFLAGS="-fPIE -Wl,-pie"
+ AC_MSG_RESULT(yes)],
+ AC_MSG_RESULT(no))
+ ;;
+
+ *)
+ CFLAGS="$CFLAGS -fPIE -pie"
+ AC_TRY_COMPILE(,,[
+ PIEFLAGS="-fPIE -pie"
+ AC_MSG_RESULT(yes)],
+ AC_MSG_RESULT(no))
+ ;;
+ esac
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"
+ # Add useful warning options for tracking down problems...
+ WARNING_OPTIONS="-Wall -Wno-format-y2k -Wunused -Wno-unused-result -Wsign-conversion"
- # Additional warning options for development testing...
- if test -d .svn; then
- OPTIM="-Wshadow -Werror $OPTIM"
- else
- AC_MSG_CHECKING(if GCC supports -Wno-tautological-compare)
- OLDCFLAGS="$CFLAGS"
- CFLAGS="$CFLAGS -Werror -Wno-tautological-compare"
- AC_TRY_COMPILE(,,
- [OPTIM="$OPTIM -Wno-tautological-compare"
- AC_MSG_RESULT(yes)],
- AC_MSG_RESULT(no))
- CFLAGS="$OLDCFLAGS"
- fi
- fi
-
- case "$uname" 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="$CFLAGS -D_FORTIFY_SOURCE=2"
+ # Test GCC version for certain warning flags since -Werror
+ # doesn't trigger...
+ gccversion=`$CC --version | head -1 | awk '{print $NF}'`
+ case "$gccversion" in
+ 1.* | 2.* | 3.* | 4.* | 5.* | 6.* | \(clang-*)
;;
-
- Linux*)
- # The -z relro option is provided by the Linux linker command to
- # make relocatable data read-only.
- if test x$enable_relro = xyes; then
- RELROFLAGS="-Wl,-z,relro"
- fi
+ *)
+ WARNING_OPTIONS="$WARNING_OPTIONS -Wno-format-truncation -Wno-format-overflow -Wno-tautological-compare"
;;
esac
+
+ # Additional warning options for development testing...
+ if test -d .git; then
+ WARNING_OPTIONS="-Werror -Wno-error=deprecated-declarations $WARNING_OPTIONS"
+ fi
else
# Add vendor-specific compiler options...
- case $uname in
- AIX*)
- if test -z "$OPTIM"; then
- if test "x$with_optim" = x; then
- OPTIM="-O2 -qmaxmem=6000"
- else
- OPTIM="$with_optim $OPTIM"
- fi
- fi
- ;;
- HP-UX*)
- if test -z "$OPTIM"; then
- if test "x$with_optim" = x; then
- OPTIM="+O2"
- else
- OPTIM="$with_optim $OPTIM"
- fi
- fi
-
- CFLAGS="-Ae $CFLAGS"
-
- if test $PICFLAG = 1; then
- OPTIM="+z $OPTIM"
- fi
- ;;
- OSF*)
- # Tru64 UNIX aka Digital UNIX aka OSF/1
- if test -z "$OPTIM"; then
- if test "x$with_optim" = x; then
- OPTIM="-O"
- else
- OPTIM="$with_optim"
- fi
- fi
- ;;
- SunOS*)
+ 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
- fi
-
- if test $PICFLAG = 1; then
- OPTIM="-KPIC $OPTIM"
- fi
- ;;
- UNIX_SVR*)
- # UnixWare
- if test -z "$OPTIM"; then
- if test "x$with_optim" = x; then
- OPTIM="-O"
- else
- OPTIM="$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-bugs@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
# Add general compiler options per platform...
-case $uname in
- HP-UX*)
- # HP-UX 10.20 (at least) needs this definition to get the
- # h_errno global...
- OPTIM="$OPTIM -D_XOPEN_SOURCE_EXTENDED"
-
- # HP-UX 11.00 (at least) needs this definition to get the
- # u_short type used by the IP headers...
- OPTIM="$OPTIM -D_INCLUDE_HPUX_SOURCE"
-
- # HP-UX 11.23 (at least) needs this definition to get the
- # IPv6 header to work...
- OPTIM="$OPTIM -D_HPUX_SOURCE"
- ;;
-
- Linux*)
+case $host_os_name in
+ linux*)
# glibc 2.8 and higher breaks peer credentials unless you
# define _GNU_SOURCE...
OPTIM="$OPTIM -D_GNU_SOURCE"
- ;;
- OSF*)
- # Tru64 UNIX aka Digital UNIX aka OSF/1 need to be told
- # to be POSIX-compliant...
- OPTIM="$OPTIM -D_XOPEN_SOURCE=500 -D_XOPEN_SOURCE_EXTENDED -D_OSF_SOURCE"
+ # The -z relro option is provided by the Linux linker command to
+ # make relocatable data read-only.
+ if test x$enable_relro = xyes; then
+ RELROFLAGS="-Wl,-z,relro,-z,now"
+ fi
;;
esac
-
-dnl
-dnl End of "$Id: cups-compiler.m4 7871 2008-08-27 21:12:43Z mike $".
-dnl
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