diff options
Diffstat (limited to 'dists/autogen/m4/pkg_config_utils.m4')
| -rw-r--r-- | dists/autogen/m4/pkg_config_utils.m4 | 190 |
1 files changed, 190 insertions, 0 deletions
diff --git a/dists/autogen/m4/pkg_config_utils.m4 b/dists/autogen/m4/pkg_config_utils.m4 new file mode 100644 index 00000000..903e0fc9 --- /dev/null +++ b/dists/autogen/m4/pkg_config_utils.m4 @@ -0,0 +1,190 @@ +# This file is part of UltraStar Deluxe +# Created by the UltraStar Deluxe Team + + +# OVERVIEW +# +# PKG_VALUE(VARIABLE_PREFIX, POSTFIX, COMMAND, MODULE, HELP-STRING) +# PKG_VERSION(VARIABLE_PREFIX, MODULE) +# PKG_HAVE(VARIABLE_PREFIX, MODULE, [REQUIRED]) +# AX_TRIM(STRING) + +# SYNOPSIS +# +# PKG_VALUE(VARIABLE_PREFIX, POSTFIX, COMMAND, MODULE, HELP-STRING) +# +# DESCRIPTION +# +# Calls pkg-config with a given command and stores the result. +# If the variable was already defined by the user or the package +# is not present on the system ([$VARIABLE_PREFIX]_HAVE <> yes) +# pkg-config will not be executed and the old value remains. +# In addition the variable will be shown on "./configure --help" +# described by a given help-string. +# +# Parameters: +# - VARIABLE_PREFIX: the prefix for the variables storing +# information about the package. +# - POSTFIX: [$VARIABLE_PREFIX]_[$POSTFIX] will contain the value +# - COMMAND: a pkg-config command, e.g. "variable=prefix" +# - MODULE: the package pkg-config will retrieve info from +# - HELP-STRING: description of the variable +# +# Sets: +# [$VARIABLE_PREFIX]_[$POSTFIX] # value (AC_SUBST) + +AC_DEFUN([PKG_VALUE], +[ + AC_ARG_VAR([$1]_[$2], [$5, overriding pkg-config]) + # check if variable was defined by the user + if test -z "$[$1]_[$2]"; then + # if not, get it from pkg-config + if test x$[$1][_HAVE] = xyes; then + PKG_CHECK_EXISTS([$4], + [[$1]_[$2]=`$PKG_CONFIG --[$3] --silence-errors "$4"`], + [# print error message and quit + err_msg=`$PKG_CONFIG --errors-to-stdout --print-errors "$4"` + AC_MSG_ERROR( +[ + +$err_msg + +If --with-[$1]=nocheck is defined the environment variable +[$1]_[$2] +must be set to avoid the need to call pkg-config. + +See the pkg-config man page for more details. +]) + + ]) + fi + fi + AC_SUBST([$1]_[$2]) +]) + +# SYNOPSIS +# +# PKG_VERSION(VARIABLE_PREFIX, MODULE) +# +# DESCRIPTION +# +# Retrieves the version of a package +# +# Parameters: +# - VARIABLE_PREFIX: the prefix for the variables storing +# information about the package. +# - MODULE: package name according to pkg-config +# +# Sets: +# [$VARIABLE_PREFIX]_VERSION # full version string +# # (format: "major.minor.release") +# +# [$VARIABLE_PREFIX]_VERSION_MAJOR # major version number +# [$VARIABLE_PREFIX]_VERSION_MINOR # minor version number +# [$VARIABLE_PREFIX]_VERSION_RELEASE # release version number +# +# [$VARIABLE_PREFIX]_VERSION_INT # integer representation: +# # MMMmmmrrr (M:major,m:minor,r:release) + +AC_DEFUN([PKG_VERSION], +[ + if test x$[$1][_HAVE] = xyes; then + AC_MSG_CHECKING([version of $1]) + PKG_VALUE([$1], [VERSION], [modversion], [$2], [version of $1]) + AC_MSG_RESULT(@<:@$[$1][_VERSION]@:>@) + else + [$1][_VERSION]="0.0.0" + fi + AX_EXTRACT_VERSION([$1], $[$1][_VERSION]) +]) + + +# SYNOPSIS +# +# AX_TRIM(STRING) +# +# DESCRIPTION +# +# Removes surrounding whitespace + +AC_DEFUN([AX_TRIM], +[ + echo "[$1]" | $SED 's/^[[ \t]]*//' | $SED 's/[[ \t]]*$//' +]) + +# SYNOPSIS +# +# PKG_HAVE(VARIABLE_PREFIX, MODULE, [REQUIRED]) +# +# DESCRIPTION +# +# Checks with pkg-config if a package exists and retrieves +# information about it. +# +# Parameters: +# - VARIABLE_PREFIX: the prefix for the variables storing information about the package. +# - MODULE: package name according to pkg-config +# - REQUIRED: if true, the configure-script is aborted if the package was not found +# +# Uses: +# with_[$VARIABLE_PREFIX]: whether and how the package should be checked for +# "check": check for the package but do not abort if it does not exist (default) +# "no": do not check for the package (sets _HAVE to "no" and _VERSION to "0.0.0") +# "yes": check for the package and abort if it does not exist +# "nocheck": do not check for the package (sets _HAVE to "yes") +# +# Sets: +# [$VARIABLE_PREFIX]_HAVE # package is available (values: "yes"|"no") +# [$VARIABLE_PREFIX]_LIBS # linker flags (e.g. -Lmylibdir -lmylib) +# [$VARIABLE_PREFIX]_LIBDIRS # library dirs (e.g. -Lmylibdir) + +AC_DEFUN([PKG_HAVE], +[ + have_lib="no" + AC_MSG_CHECKING([for $2]) + if test x"$with_[$1]" = xnocheck; then + # do not call pkg-config, use user settings + have_lib="yes" + elif test x"$with_[$1]" != xno; then + # check if package exists + PKG_CHECK_EXISTS([$2], [ + have_lib="yes" + [$1][_LIBS]=`$PKG_CONFIG --libs --silence-errors "$2"` + [$1][_LIBDIRS]=`$PKG_CONFIG --libs-only-L --silence-errors "$2"` + [$1][_LIBDIRS]=`AX_TRIM($[$1][_LIBDIRS])` + # add library directories to LIBS (ignore *_LIBS for now) + if test -n "$[$1][_LIBDIRS]"; then + LIBS="$LIBS $[$1][_LIBDIRS]" + fi + ]) + fi + if test x$have_lib = xyes; then + [$1][_HAVE]="yes" + if test -n "$[$1][_LIBDIRS]"; then + # show additional lib-dirs + AC_MSG_RESULT(yes [(]$[$1][_LIBDIRS][)]) + else + AC_MSG_RESULT(yes) + fi + else + [$1][_HAVE]="no" + AC_MSG_RESULT(no) + + # check if package is required + if test x$3 = xyes -o x"$with_[$1]" = xyes ; then + # print error message and quit + err_msg=`$PKG_CONFIG --errors-to-stdout --print-errors "$2"` + AC_MSG_ERROR( +[ + +$err_msg + +Alternatively, you may set --with-[$1]=nocheck and the environment +variables [$1]_[[...]] (see configure --help) +to appropriate values to avoid the need to call pkg-config. + +See the pkg-config man page for more details. +]) + fi + fi +]) |