mirror of https://gitee.com/openkylin/cups.git
228 lines
6.3 KiB
Plaintext
228 lines
6.3 KiB
Plaintext
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dnl
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dnl Compiler stuff for CUPS.
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dnl
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dnl Copyright 2007-2018 by Apple Inc.
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dnl Copyright 1997-2007 by Easy Software Products, all rights reserved.
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dnl
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dnl Licensed under Apache License v2.0. See the file "LICENSE" for more information.
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dnl
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dnl Clear the debugging and non-shared library options unless the user asks
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dnl for them...
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INSTALL_STRIP=""
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AC_SUBST(INSTALL_STRIP)
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AC_ARG_WITH(optim, [ --with-optim set optimization flags ],
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OPTIM="$withval",
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OPTIM="")
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AC_SUBST(OPTIM)
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AC_ARG_ENABLE(debug, [ --enable-debug build with debugging symbols])
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AC_ARG_ENABLE(debug_guards, [ --enable-debug-guards build with memory allocation guards])
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AC_ARG_ENABLE(debug_printfs, [ --enable-debug-printfs build with CUPS_DEBUG_LOG support])
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AC_ARG_ENABLE(unit_tests, [ --enable-unit-tests build and run unit tests])
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dnl For debugging, keep symbols, otherwise strip them...
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if test x$enable_debug = xyes -a "x$OPTIM" = x; then
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OPTIM="-g"
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else
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INSTALL_STRIP="-s"
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fi
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dnl Debug printfs can slow things down, so provide a separate option for that
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if test x$enable_debug_printfs = xyes; then
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CFLAGS="$CFLAGS -DDEBUG"
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CXXFLAGS="$CXXFLAGS -DDEBUG"
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fi
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dnl Debug guards use an extra 4 bytes for some structures like strings in the
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dnl string pool, so provide a separate option for that
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if test x$enable_debug_guards = xyes; then
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CFLAGS="$CFLAGS -DDEBUG_GUARDS"
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CXXFLAGS="$CXXFLAGS -DDEBUG_GUARDS"
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fi
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dnl Unit tests take up time during a compile...
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if test x$enable_unit_tests = xyes; then
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if test "$build" != "$host"; then
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AC_MSG_ERROR([Sorry, cannot build unit tests when cross-compiling.])
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fi
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UNITTESTS="unittests"
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else
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UNITTESTS=""
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fi
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AC_SUBST(UNITTESTS)
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dnl Setup general architecture flags...
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AC_ARG_WITH(archflags, [ --with-archflags set default architecture flags ])
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AC_ARG_WITH(ldarchflags, [ --with-ldarchflags set program architecture flags ])
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if test -z "$with_archflags"; then
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ARCHFLAGS=""
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else
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ARCHFLAGS="$with_archflags"
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fi
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if test -z "$with_ldarchflags"; then
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if test "$host_os_name" = darwin; then
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# Only create Intel programs by default
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LDARCHFLAGS="`echo $ARCHFLAGS | sed -e '1,$s/-arch ppc64//'`"
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else
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LDARCHFLAGS="$ARCHFLAGS"
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fi
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else
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LDARCHFLAGS="$with_ldarchflags"
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fi
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AC_SUBST(ARCHFLAGS)
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AC_SUBST(LDARCHFLAGS)
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dnl Read-only data/program support on Linux...
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AC_ARG_ENABLE(relro, [ --enable-relro build with the GCC relro option])
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dnl Clang/GCC address sanitizer...
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AC_ARG_ENABLE(sanitizer, [ --enable-sanitizer build with AddressSanitizer])
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dnl Update compiler options...
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CXXLIBS="${CXXLIBS:=}"
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AC_SUBST(CXXLIBS)
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PIEFLAGS=""
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AC_SUBST(PIEFLAGS)
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RELROFLAGS=""
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AC_SUBST(RELROFLAGS)
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WARNING_OPTIONS=""
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AC_SUBST(WARNING_OPTIONS)
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if test -n "$GCC"; then
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# Add GCC-specific compiler options...
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# Address sanitizer is a useful tool to use when developing/debugging
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# code but adds about 2x overhead...
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if test x$enable_sanitizer = xyes; then
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# Use -fsanitize=address with debugging...
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OPTIM="$OPTIM -g -fsanitize=address"
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else
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# Otherwise use the Fortify enhancements to catch any unbounded
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# string operations...
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CFLAGS="$CFLAGS -D_FORTIFY_SOURCE=2"
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CXXFLAGS="$CXXFLAGS -D_FORTIFY_SOURCE=2"
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fi
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# Default optimization options...
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if test -z "$OPTIM"; then
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# Default to optimize-for-size and debug
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OPTIM="-Os -g"
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fi
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# Generate position-independent code as needed...
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if test $PICFLAG = 1; then
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OPTIM="-fPIC $OPTIM"
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fi
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# The -fstack-protector option is available with some versions of
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# GCC and adds "stack canaries" which detect when the return address
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# has been overwritten, preventing many types of exploit attacks.
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AC_MSG_CHECKING(whether compiler supports -fstack-protector)
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OLDCFLAGS="$CFLAGS"
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CFLAGS="$CFLAGS -fstack-protector"
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AC_TRY_LINK(,,
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if test "x$LSB_BUILD" = xy; then
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# Can't use stack-protector with LSB binaries...
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OPTIM="$OPTIM -fno-stack-protector"
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else
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OPTIM="$OPTIM -fstack-protector"
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fi
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AC_MSG_RESULT(yes),
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AC_MSG_RESULT(no))
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CFLAGS="$OLDCFLAGS"
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if test "x$LSB_BUILD" != xy; then
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# The -fPIE option is available with some versions of GCC and
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# adds randomization of addresses, which avoids another class of
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# exploits that depend on a fixed address for common functions.
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#
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# Not available to LSB binaries...
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AC_MSG_CHECKING(whether compiler supports -fPIE)
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OLDCFLAGS="$CFLAGS"
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case "$host_os_name" in
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darwin*)
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CFLAGS="$CFLAGS -fPIE -Wl,-pie"
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AC_TRY_COMPILE(,,[
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PIEFLAGS="-fPIE -Wl,-pie"
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AC_MSG_RESULT(yes)],
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AC_MSG_RESULT(no))
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;;
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*)
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CFLAGS="$CFLAGS -fPIE -pie"
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AC_TRY_COMPILE(,,[
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PIEFLAGS="-fPIE -pie"
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AC_MSG_RESULT(yes)],
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AC_MSG_RESULT(no))
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;;
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esac
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CFLAGS="$OLDCFLAGS"
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fi
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# Add useful warning options for tracking down problems...
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WARNING_OPTIONS="-Wall -Wno-format-y2k -Wunused -Wno-unused-result -Wsign-conversion"
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# Test GCC version for certain warning flags since -Werror
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# doesn't trigger...
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gccversion=`$CC --version | head -1 | awk '{print $NF}'`
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case "$gccversion" in
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1.* | 2.* | 3.* | 4.* | 5.* | 6.* | \(clang-*)
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;;
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*)
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WARNING_OPTIONS="$WARNING_OPTIONS -Wno-format-truncation -Wno-format-overflow -Wno-tautological-compare"
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;;
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esac
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# Additional warning options for development testing...
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if test -d .git; then
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WARNING_OPTIONS="-Werror -Wno-error=deprecated-declarations $WARNING_OPTIONS"
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fi
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else
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# Add vendor-specific compiler options...
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case $host_os_name in
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sunos*)
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# Solaris
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if test -z "$OPTIM"; then
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OPTIM="-xO2"
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fi
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if test $PICFLAG = 1; then
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OPTIM="-KPIC $OPTIM"
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fi
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;;
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*)
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# Running some other operating system; inform the user
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# they should contribute the necessary options via
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# Github...
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echo "Building CUPS with default compiler optimizations; contact the CUPS developers on Github"
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echo "(https://github.com/apple/cups/issues) with the uname and compiler options needed for"
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echo "your platform, or set the CFLAGS and LDFLAGS environment variables before running"
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echo "configure."
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;;
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esac
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fi
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# Add general compiler options per platform...
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case $host_os_name in
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linux*)
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# glibc 2.8 and higher breaks peer credentials unless you
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# define _GNU_SOURCE...
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OPTIM="$OPTIM -D_GNU_SOURCE"
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# The -z relro option is provided by the Linux linker command to
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# make relocatable data read-only.
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if test x$enable_relro = xyes; then
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RELROFLAGS="-Wl,-z,relro,-z,now"
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fi
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;;
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esac
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