1# 2# Copyright (c) 2011, 2019, Oracle and/or its affiliates. All rights reserved. 3# DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4# 5# This code is free software; you can redistribute it and/or modify it 6# under the terms of the GNU General Public License version 2 only, as 7# published by the Free Software Foundation. Oracle designates this 8# particular file as subject to the "Classpath" exception as provided 9# by Oracle in the LICENSE file that accompanied this code. 10# 11# This code is distributed in the hope that it will be useful, but WITHOUT 12# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14# version 2 for more details (a copy is included in the LICENSE file that 15# accompanied this code). 16# 17# You should have received a copy of the GNU General Public License version 18# 2 along with this work; if not, write to the Free Software Foundation, 19# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20# 21# Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22# or visit www.oracle.com if you need additional information or have any 23# questions. 24# 25 26################################################################################ 27# 28 29AC_DEFUN([FLAGS_SETUP_LDFLAGS], 30[ 31 FLAGS_SETUP_LDFLAGS_HELPER 32 33 # Setup the target toolchain 34 35 # On some platforms (mac) the linker warns about non existing -L dirs. 36 # For any of the variants server, client or minimal, the dir matches the 37 # variant name. The "main" variant should be used for linking. For the 38 # rest, the dir is just server. 39 if HOTSPOT_CHECK_JVM_VARIANT(server) || HOTSPOT_CHECK_JVM_VARIANT(client) \ 40 || HOTSPOT_CHECK_JVM_VARIANT(minimal); then 41 TARGET_JVM_VARIANT_PATH=$JVM_VARIANT_MAIN 42 else 43 TARGET_JVM_VARIANT_PATH=server 44 fi 45 FLAGS_SETUP_LDFLAGS_CPU_DEP([TARGET]) 46 47 # Setup the build toolchain 48 49 # When building a buildjdk, it's always only the server variant 50 BUILD_JVM_VARIANT_PATH=server 51 52 FLAGS_SETUP_LDFLAGS_CPU_DEP([BUILD], [OPENJDK_BUILD_]) 53 54 LDFLAGS_TESTEXE="${TARGET_LDFLAGS_JDK_LIBPATH}" 55 AC_SUBST(LDFLAGS_TESTEXE) 56]) 57 58################################################################################ 59 60# CPU independent LDFLAGS setup, used for both target and build toolchain. 61AC_DEFUN([FLAGS_SETUP_LDFLAGS_HELPER], 62[ 63 # Setup basic LDFLAGS 64 if test "x$TOOLCHAIN_TYPE" = xgcc; then 65 # If this is a --hash-style=gnu system, use --hash-style=both, why? 66 # We have previously set HAS_GNU_HASH if this is the case 67 if test -n "$HAS_GNU_HASH"; then 68 BASIC_LDFLAGS="-Wl,--hash-style=both" 69 LIBJSIG_HASHSTYLE_LDFLAGS="-Wl,--hash-style=both" 70 fi 71 72 # Add -z defs, to forbid undefined symbols in object files. 73 # add relro (mark relocations read only) for all libs 74 if test "x$OPENJDK_TARGET_OS" != xbsd; then 75 BASIC_LDFLAGS="$BASIC_LDFLAGS -Wl,-z,defs -Wl,-z,relro" 76 fi 77 78 # s390x : remove unused code+data in link step 79 if test "x$OPENJDK_TARGET_CPU" = xs390x; then 80 BASIC_LDFLAGS="$BASIC_LDFLAGS -Wl,--gc-sections -Wl,--print-gc-sections" 81 fi 82 83 BASIC_LDFLAGS_JVM_ONLY="-Wl,-O1" 84 85 elif test "x$TOOLCHAIN_TYPE" = xclang; then 86 BASIC_LDFLAGS_JVM_ONLY="-mno-omit-leaf-frame-pointer -mstack-alignment=16 \ 87 -fPIC" 88 89 elif test "x$TOOLCHAIN_TYPE" = xsolstudio; then 90 BASIC_LDFLAGS="-Wl,-z,defs" 91 BASIC_LDFLAGS_ONLYCXX="-norunpath" 92 BASIC_LDFLAGS_ONLYCXX_JDK_ONLY="-xnolib" 93 94 BASIC_LDFLAGS_JDK_ONLY="-ztext" 95 BASIC_LDFLAGS_JVM_ONLY="-library=%none -mt -z noversion" 96 97 elif test "x$TOOLCHAIN_TYPE" = xxlc; then 98 BASIC_LDFLAGS="-b64 -brtl -bnorwexec -bnolibpath -bexpall -bernotok -btextpsize:64K \ 99 -bdatapsize:64K -bstackpsize:64K" 100 # libjvm.so has gotten too large for normal TOC size; compile with qpic=large and link with bigtoc 101 BASIC_LDFLAGS_JVM_ONLY="-Wl,-lC_r -bbigtoc" 102 103 elif test "x$TOOLCHAIN_TYPE" = xmicrosoft; then 104 BASIC_LDFLAGS="-nologo -opt:ref" 105 BASIC_LDFLAGS_JDK_ONLY="-incremental:no" 106 BASIC_LDFLAGS_JVM_ONLY="-opt:icf,8 -subsystem:windows" 107 fi 108 109 if test "x$TOOLCHAIN_TYPE" = xgcc || test "x$TOOLCHAIN_TYPE" = xclang; then 110 if test -n "$HAS_NOEXECSTACK"; then 111 BASIC_LDFLAGS="$BASIC_LDFLAGS -Wl,-z,noexecstack" 112 fi 113 fi 114 115 # Setup OS-dependent LDFLAGS 116 if test "x$TOOLCHAIN_TYPE" = xclang || test "x$TOOLCHAIN_TYPE" = xgcc; then 117 if test "x$OPENJDK_TARGET_OS" = xmacosx; then 118 # Assume clang or gcc. 119 # FIXME: We should really generalize SET_SHARED_LIBRARY_ORIGIN instead. 120 OS_LDFLAGS_JVM_ONLY="-Wl,-rpath,@loader_path/. -Wl,-rpath,@loader_path/.." 121 OS_LDFLAGS_JDK_ONLY="-mmacosx-version-min=$MACOSX_VERSION_MIN" 122 fi 123 # On OpenBSD check to see if ld requires -z wxneeded 124 if test "x$OPENJDK_TARGET_OS_ENV" = xbsd.openbsd; then 125 AC_MSG_CHECKING([if ld requires -z wxneeded]) 126 PUSHED_LDFLAGS="$LDFLAGS" 127 LDFLAGS="$LDFLAGS -Wl,-z,wxneeded" 128 AC_LINK_IFELSE([AC_LANG_SOURCE([[int main() { }]])], 129 [ 130 if $READELF -l conftest$ac_exeext | $GREP WXNEED > /dev/null; then 131 AC_MSG_RESULT([yes]) 132 OS_LDFLAGS_JDK_ONLY="-Wl,-z,wxneeded" 133 else 134 AC_MSG_RESULT([no]) 135 fi 136 ], 137 [ 138 AC_MSG_RESULT([no]) 139 ], 140 [ 141 AC_MSG_RESULT([no]) 142 ] 143 ) 144 LDFLAGS="$PUSHED_LDFLAGS" 145 fi 146 fi 147 148 # Setup debug level-dependent LDFLAGS 149 if test "x$TOOLCHAIN_TYPE" = xgcc; then 150 if test "x$OPENJDK_TARGET_OS" = xlinux; then 151 if test x$DEBUG_LEVEL = xrelease; then 152 DEBUGLEVEL_LDFLAGS_JDK_ONLY="$DEBUGLEVEL_LDFLAGS_JDK_ONLY -Wl,-O1" 153 fi 154 if test x$DEBUG_LEVEL = xslowdebug; then 155 # do relocations at load 156 DEBUGLEVEL_LDFLAGS="-Wl,-z,now" 157 fi 158 fi 159 160 elif test "x$TOOLCHAIN_TYPE" = xxlc; then 161 # We need '-qminimaltoc' or '-qpic=large -bbigtoc' if the TOC overflows. 162 # Hotspot now overflows its 64K TOC (currently only for debug), 163 # so we build with '-qpic=large -bbigtoc'. 164 if test "x$DEBUG_LEVEL" != xrelease; then 165 DEBUGLEVEL_LDFLAGS_JVM_ONLY="$DEBUGLEVEL_LDFLAGS_JVM_ONLY -bbigtoc" 166 fi 167 fi 168 169 # Setup warning flags 170 if test "x$TOOLCHAIN_TYPE" = xsolstudio; then 171 LDFLAGS_WARNINGS_ARE_ERRORS="-Wl,-z,fatal-warnings" 172 else 173 LDFLAGS_WARNINGS_ARE_ERRORS="" 174 fi 175 AC_SUBST(LDFLAGS_WARNINGS_ARE_ERRORS) 176 177 # Setup LDFLAGS for linking executables 178 if test "x$TOOLCHAIN_TYPE" = xgcc; then 179 EXECUTABLE_LDFLAGS="$EXECUTABLE_LDFLAGS -Wl,--allow-shlib-undefined" 180 fi 181 182 if test "x$TOOLCHAIN_TYPE" = xgcc || test "x$TOOLCHAIN_TYPE" = xclang; then 183 # Enabling pie on 32 bit builds prevents the JVM from allocating a continuous 184 # java heap. 185 if test "x$OPENJDK_TARGET_CPU_BITS" != "x32"; then 186 EXECUTABLE_LDFLAGS="$EXECUTABLE_LDFLAGS -pie" 187 fi 188 fi 189 190 if test "x$ALLOW_ABSOLUTE_PATHS_IN_OUTPUT" = "xfalse"; then 191 if test "x$TOOLCHAIN_TYPE" = xmicrosoft; then 192 BASIC_LDFLAGS="$BASIC_LDFLAGS -pdbaltpath:%_PDB%" 193 fi 194 fi 195 196 # Export some intermediate variables for compatibility 197 LDFLAGS_CXX_JDK="$BASIC_LDFLAGS_ONLYCXX $BASIC_LDFLAGS_ONLYCXX_JDK_ONLY $DEBUGLEVEL_LDFLAGS_JDK_ONLY" 198 AC_SUBST(LDFLAGS_CXX_JDK) 199 AC_SUBST(LIBJSIG_HASHSTYLE_LDFLAGS) 200 AC_SUBST(LIBJSIG_NOEXECSTACK_LDFLAGS) 201]) 202 203################################################################################ 204# $1 - Either BUILD or TARGET to pick the correct OS/CPU variables to check 205# conditionals against. 206# $2 - Optional prefix for each variable defined. 207AC_DEFUN([FLAGS_SETUP_LDFLAGS_CPU_DEP], 208[ 209 # Setup CPU-dependent basic LDFLAGS. These can differ between the target and 210 # build toolchain. 211 if test "x$TOOLCHAIN_TYPE" = xgcc; then 212 if test "x${OPENJDK_$1_CPU}" = xx86; then 213 $1_CPU_LDFLAGS_JVM_ONLY="-march=i586" 214 elif test "x$OPENJDK_$1_CPU" = xarm; then 215 $1_CPU_LDFLAGS_JVM_ONLY="${$1_CPU_LDFLAGS_JVM_ONLY} -fsigned-char" 216 $1_CPU_LDFLAGS="$ARM_ARCH_TYPE_FLAGS $ARM_FLOAT_TYPE_FLAGS" 217 fi 218 219 elif test "x$TOOLCHAIN_TYPE" = xsolstudio; then 220 if test "x${OPENJDK_$1_CPU}" = "xsparcv9"; then 221 $1_CPU_LDFLAGS_JVM_ONLY="-xarch=sparc" 222 fi 223 224 elif test "x$TOOLCHAIN_TYPE" = xmicrosoft; then 225 if test "x${OPENJDK_$1_CPU}" = "xx86"; then 226 $1_CPU_LDFLAGS="-safeseh" 227 # NOTE: Old build added -machine. Probably not needed. 228 $1_CPU_LDFLAGS_JVM_ONLY="-machine:I386" 229 $1_CPU_EXECUTABLE_LDFLAGS="-stack:327680" 230 else 231 $1_CPU_LDFLAGS_JVM_ONLY="-machine:AMD64" 232 $1_CPU_EXECUTABLE_LDFLAGS="-stack:1048576" 233 fi 234 fi 235 236 # JVM_VARIANT_PATH depends on if this is build or target... 237 if test "x$TOOLCHAIN_TYPE" = xmicrosoft; then 238 $1_LDFLAGS_JDK_LIBPATH="-libpath:${OUTPUTDIR}/support/modules_libs/java.base" 239 else 240 $1_LDFLAGS_JDK_LIBPATH="-L\$(SUPPORT_OUTPUTDIR)/modules_libs/java.base \ 241 -L\$(SUPPORT_OUTPUTDIR)/modules_libs/java.base/${$1_JVM_VARIANT_PATH}" 242 fi 243 244 # Export variables according to old definitions, prefix with $2 if present. 245 LDFLAGS_JDK_COMMON="$BASIC_LDFLAGS $BASIC_LDFLAGS_JDK_ONLY \ 246 $OS_LDFLAGS_JDK_ONLY $DEBUGLEVEL_LDFLAGS_JDK_ONLY ${$2EXTRA_LDFLAGS}" 247 $2LDFLAGS_JDKLIB="$LDFLAGS_JDK_COMMON $BASIC_LDFLAGS_JDK_LIB_ONLY \ 248 ${$1_LDFLAGS_JDK_LIBPATH} $SHARED_LIBRARY_FLAGS" 249 $2LDFLAGS_JDKEXE="$LDFLAGS_JDK_COMMON $EXECUTABLE_LDFLAGS \ 250 ${$1_CPU_EXECUTABLE_LDFLAGS}" 251 252 $2JVM_LDFLAGS="$BASIC_LDFLAGS $BASIC_LDFLAGS_JVM_ONLY $OS_LDFLAGS_JVM_ONLY \ 253 $DEBUGLEVEL_LDFLAGS $DEBUGLEVEL_LDFLAGS_JVM_ONLY $BASIC_LDFLAGS_ONLYCXX \ 254 ${$1_CPU_LDFLAGS} ${$1_CPU_LDFLAGS_JVM_ONLY} ${$2EXTRA_LDFLAGS}" 255 256 AC_SUBST($2LDFLAGS_JDKLIB) 257 AC_SUBST($2LDFLAGS_JDKEXE) 258 259 AC_SUBST($2JVM_LDFLAGS) 260]) 261