1# lib-prefix.m4 serial 14 2dnl Copyright (C) 2001-2005, 2008-2019 Free Software Foundation, Inc. 3dnl This file is free software; the Free Software Foundation 4dnl gives unlimited permission to copy and/or distribute it, 5dnl with or without modifications, as long as this notice is preserved. 6 7dnl From Bruno Haible. 8 9dnl AC_LIB_PREFIX adds to the CPPFLAGS and LDFLAGS the flags that are needed 10dnl to access previously installed libraries. The basic assumption is that 11dnl packages should use other packages that are installed with the same 12dnl --prefix option. This macro is not needed if only AC_LIB_LINKFLAGS is 13dnl used to locate libraries, but is otherwise very convenient. 14AC_DEFUN([AC_LIB_PREFIX], 15[ 16 AC_BEFORE([$0], [AC_LIB_LINKFLAGS]) 17 AC_REQUIRE([AC_PROG_CC]) 18 AC_REQUIRE([AC_CANONICAL_HOST]) 19 AC_REQUIRE([AC_LIB_PREPARE_MULTILIB]) 20 AC_REQUIRE([AC_LIB_PREPARE_PREFIX]) 21 dnl By default, look in $includedir and $libdir. 22 use_additional=yes 23 AC_LIB_WITH_FINAL_PREFIX([ 24 eval additional_includedir=\"$includedir\" 25 eval additional_libdir=\"$libdir\" 26 ]) 27 AC_ARG_WITH([lib-prefix], 28[[ --with-lib-prefix[=DIR] search for libraries in DIR/include and DIR/lib 29 --without-lib-prefix don't search for libraries in includedir and libdir]], 30[ 31 if test "X$withval" = "Xno"; then 32 use_additional=no 33 else 34 if test "X$withval" = "X"; then 35 AC_LIB_WITH_FINAL_PREFIX([ 36 eval additional_includedir=\"$includedir\" 37 eval additional_libdir=\"$libdir\" 38 ]) 39 else 40 additional_includedir="$withval/include" 41 additional_libdir="$withval/$acl_libdirstem" 42 fi 43 fi 44]) 45 if test $use_additional = yes; then 46 dnl Potentially add $additional_includedir to $CPPFLAGS. 47 dnl But don't add it 48 dnl 1. if it's the standard /usr/include, 49 dnl 2. if it's already present in $CPPFLAGS, 50 dnl 3. if it's /usr/local/include and we are using GCC on Linux, 51 dnl 4. if it doesn't exist as a directory. 52 if test "X$additional_includedir" != "X/usr/include"; then 53 haveit= 54 for x in $CPPFLAGS; do 55 AC_LIB_WITH_FINAL_PREFIX([eval x=\"$x\"]) 56 if test "X$x" = "X-I$additional_includedir"; then 57 haveit=yes 58 break 59 fi 60 done 61 if test -z "$haveit"; then 62 if test "X$additional_includedir" = "X/usr/local/include"; then 63 if test -n "$GCC"; then 64 case $host_os in 65 linux* | gnu* | k*bsd*-gnu) haveit=yes;; 66 esac 67 fi 68 fi 69 if test -z "$haveit"; then 70 if test -d "$additional_includedir"; then 71 dnl Really add $additional_includedir to $CPPFLAGS. 72 CPPFLAGS="${CPPFLAGS}${CPPFLAGS:+ }-I$additional_includedir" 73 fi 74 fi 75 fi 76 fi 77 dnl Potentially add $additional_libdir to $LDFLAGS. 78 dnl But don't add it 79 dnl 1. if it's the standard /usr/lib, 80 dnl 2. if it's already present in $LDFLAGS, 81 dnl 3. if it's /usr/local/lib and we are using GCC on Linux, 82 dnl 4. if it doesn't exist as a directory. 83 if test "X$additional_libdir" != "X/usr/$acl_libdirstem"; then 84 haveit= 85 for x in $LDFLAGS; do 86 AC_LIB_WITH_FINAL_PREFIX([eval x=\"$x\"]) 87 if test "X$x" = "X-L$additional_libdir"; then 88 haveit=yes 89 break 90 fi 91 done 92 if test -z "$haveit"; then 93 if test "X$additional_libdir" = "X/usr/local/$acl_libdirstem"; then 94 if test -n "$GCC"; then 95 case $host_os in 96 linux*) haveit=yes;; 97 esac 98 fi 99 fi 100 if test -z "$haveit"; then 101 if test -d "$additional_libdir"; then 102 dnl Really add $additional_libdir to $LDFLAGS. 103 LDFLAGS="${LDFLAGS}${LDFLAGS:+ }-L$additional_libdir" 104 fi 105 fi 106 fi 107 fi 108 fi 109]) 110 111dnl AC_LIB_PREPARE_PREFIX creates variables acl_final_prefix, 112dnl acl_final_exec_prefix, containing the values to which $prefix and 113dnl $exec_prefix will expand at the end of the configure script. 114AC_DEFUN([AC_LIB_PREPARE_PREFIX], 115[ 116 dnl Unfortunately, prefix and exec_prefix get only finally determined 117 dnl at the end of configure. 118 if test "X$prefix" = "XNONE"; then 119 acl_final_prefix="$ac_default_prefix" 120 else 121 acl_final_prefix="$prefix" 122 fi 123 if test "X$exec_prefix" = "XNONE"; then 124 acl_final_exec_prefix='${prefix}' 125 else 126 acl_final_exec_prefix="$exec_prefix" 127 fi 128 acl_save_prefix="$prefix" 129 prefix="$acl_final_prefix" 130 eval acl_final_exec_prefix=\"$acl_final_exec_prefix\" 131 prefix="$acl_save_prefix" 132]) 133 134dnl AC_LIB_WITH_FINAL_PREFIX([statement]) evaluates statement, with the 135dnl variables prefix and exec_prefix bound to the values they will have 136dnl at the end of the configure script. 137AC_DEFUN([AC_LIB_WITH_FINAL_PREFIX], 138[ 139 acl_save_prefix="$prefix" 140 prefix="$acl_final_prefix" 141 acl_save_exec_prefix="$exec_prefix" 142 exec_prefix="$acl_final_exec_prefix" 143 $1 144 exec_prefix="$acl_save_exec_prefix" 145 prefix="$acl_save_prefix" 146]) 147 148dnl AC_LIB_PREPARE_MULTILIB creates 149dnl - a variable acl_libdirstem, containing the basename of the libdir, either 150dnl "lib" or "lib64" or "lib/64", 151dnl - a variable acl_libdirstem2, as a secondary possible value for 152dnl acl_libdirstem, either the same as acl_libdirstem or "lib/sparcv9" or 153dnl "lib/amd64". 154AC_DEFUN([AC_LIB_PREPARE_MULTILIB], 155[ 156 dnl There is no formal standard regarding lib and lib64. 157 dnl On glibc systems, the current practice is that on a system supporting 158 dnl 32-bit and 64-bit instruction sets or ABIs, 64-bit libraries go under 159 dnl $prefix/lib64 and 32-bit libraries go under $prefix/lib. We determine 160 dnl the compiler's default mode by looking at the compiler's library search 161 dnl path. If at least one of its elements ends in /lib64 or points to a 162 dnl directory whose absolute pathname ends in /lib64, we assume a 64-bit ABI. 163 dnl Otherwise we use the default, namely "lib". 164 dnl On Solaris systems, the current practice is that on a system supporting 165 dnl 32-bit and 64-bit instruction sets or ABIs, 64-bit libraries go under 166 dnl $prefix/lib/64 (which is a symlink to either $prefix/lib/sparcv9 or 167 dnl $prefix/lib/amd64) and 32-bit libraries go under $prefix/lib. 168 AC_REQUIRE([AC_CANONICAL_HOST]) 169 AC_REQUIRE([gl_HOST_CPU_C_ABI_32BIT]) 170 171 case "$host_os" in 172 solaris*) 173 AC_CACHE_CHECK([for 64-bit host], [gl_cv_solaris_64bit], 174 [AC_COMPILE_IFELSE( 175 [AC_LANG_SOURCE( 176 [[#ifdef _LP64 177 int ok; 178 #else 179 error fail 180 #endif 181 ]])], 182 [gl_cv_solaris_64bit=yes], 183 [gl_cv_solaris_64bit=no]) 184 ]);; 185 esac 186 187 dnl Allow the user to override the result by setting acl_cv_libdirstems. 188 AC_CACHE_CHECK([for the common suffixes of directories in the library search path], 189 [acl_cv_libdirstems], 190 [acl_libdirstem=lib 191 acl_libdirstem2= 192 case "$host_os" in 193 solaris*) 194 dnl See Solaris 10 Software Developer Collection > Solaris 64-bit Developer's Guide > The Development Environment 195 dnl <https://docs.oracle.com/cd/E19253-01/816-5138/dev-env/index.html>. 196 dnl "Portable Makefiles should refer to any library directories using the 64 symbolic link." 197 dnl But we want to recognize the sparcv9 or amd64 subdirectory also if the 198 dnl symlink is missing, so we set acl_libdirstem2 too. 199 if test $gl_cv_solaris_64bit = yes; then 200 acl_libdirstem=lib/64 201 case "$host_cpu" in 202 sparc*) acl_libdirstem2=lib/sparcv9 ;; 203 i*86 | x86_64) acl_libdirstem2=lib/amd64 ;; 204 esac 205 fi 206 ;; 207 *) 208 dnl If $CC generates code for a 32-bit ABI, the libraries are 209 dnl surely under $prefix/lib, not $prefix/lib64. 210 if test "$HOST_CPU_C_ABI_32BIT" != yes; then 211 dnl The result is a property of the system. However, non-system 212 dnl compilers sometimes have odd library search paths. Therefore 213 dnl prefer asking /usr/bin/gcc, if available, rather than $CC. 214 searchpath=`(if test -f /usr/bin/gcc \ 215 && LC_ALL=C /usr/bin/gcc -print-search-dirs >/dev/null 2>/dev/null; then \ 216 LC_ALL=C /usr/bin/gcc -print-search-dirs; \ 217 else \ 218 LC_ALL=C $CC -print-search-dirs; \ 219 fi) 2>/dev/null \ 220 | sed -n -e 's,^libraries: ,,p' | sed -e 's,^=,,'` 221 if test -n "$searchpath"; then 222 acl_save_IFS="${IFS= }"; IFS=":" 223 for searchdir in $searchpath; do 224 if test -d "$searchdir"; then 225 case "$searchdir" in 226 */lib64/ | */lib64 ) acl_libdirstem=lib64 ;; 227 */../ | */.. ) 228 # Better ignore directories of this form. They are misleading. 229 ;; 230 *) searchdir=`cd "$searchdir" && pwd` 231 case "$searchdir" in 232 */lib64 ) acl_libdirstem=lib64 ;; 233 esac ;; 234 esac 235 fi 236 done 237 IFS="$acl_save_IFS" 238 fi 239 fi 240 ;; 241 esac 242 test -n "$acl_libdirstem2" || acl_libdirstem2="$acl_libdirstem" 243 acl_cv_libdirstems="$acl_libdirstem,$acl_libdirstem2" 244 ]) 245 # Decompose acl_cv_libdirstems into acl_libdirstem and acl_libdirstem2. 246 acl_libdirstem=`echo "$acl_cv_libdirstems" | sed -e 's/,.*//'` 247 acl_libdirstem2=`echo "$acl_cv_libdirstems" | sed -e '/,/s/.*,//'` 248]) 249