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# Anticonf (tm) script by Jeroen Ooms (2021)
# This script will query 'pkg-config' for the required cflags and ldflags.
# If pkg-config is unavailable or does not find the library, try setting
# INCLUDE_DIR and LIB_DIR manually via e.g:
# R CMD INSTALL --configure-vars='INCLUDE_DIR=/.../include LIB_DIR=/.../lib'
# Library settings
PKG_CONFIG_NAME="libwebp"
PKG_DEB_NAME="libwebp-dev"
PKG_RPM_NAME="libwebp-devel"
PKG_CSW_NAME="libwebp_dev"
PKG_BREW_NAME="webp"
PKG_TEST_HEADER="<webp/encode.h>"
PKG_LIBS="-lwebp"
PKG_CFLAGS=""
# Use pkg-config if available
if [ `command -v pkg-config` ]; then
PKGCONFIG_CFLAGS=`pkg-config --cflags --silence-errors ${PKG_CONFIG_NAME}`
PKGCONFIG_LIBS=`pkg-config --libs ${PKG_CONFIG_NAME}`
fi
# Note that cflags may be empty in case of success
if [ "$INCLUDE_DIR" ] || [ "$LIB_DIR" ]; then
echo "Found INCLUDE_DIR and/or LIB_DIR!"
PKG_CFLAGS="-I$INCLUDE_DIR $PKG_CFLAGS"
PKG_LIBS="-L$LIB_DIR $PKG_LIBS"
elif [ "$PKGCONFIG_CFLAGS" ] || [ "$PKGCONFIG_LIBS" ]; then
echo "Found pkg-config cflags and libs!"
PKG_CFLAGS=${PKGCONFIG_CFLAGS}
PKG_LIBS=${PKGCONFIG_LIBS}
elif [ `uname` = "Darwin" ]; then
test ! "$CI" && brew --version 2>/dev/null
if [ $? -eq 0 ]; then
BREWDIR=`brew --prefix`
PKG_CFLAGS="-I$BREWDIR/include"
PKG_LIBS="-L$BREWDIR/lib $PKG_LIBS"
else
curl -sfL "https://autobrew.github.io/scripts/webp" > autobrew
. ./autobrew
fi
fi
# For debugging
echo "Using PKG_CFLAGS=$PKG_CFLAGS"
echo "Using PKG_LIBS=$PKG_LIBS"
# Find compiler
CC=`${R_HOME}/bin/R CMD config CC`
CFLAGS=`${R_HOME}/bin/R CMD config CFLAGS`
CPPFLAGS=`${R_HOME}/bin/R CMD config CPPFLAGS`
# Test configuration
echo "#include $PKG_TEST_HEADER" | ${CC} ${CPPFLAGS} ${PKG_CFLAGS} ${CFLAGS} -E -xc - >/dev/null 2>configure.log
# Customize the error
if [ $? -ne 0 ]; then
echo "--------------------------- [ANTICONF] --------------------------------"
echo "Configuration failed because $PKG_CONFIG_NAME was not found. Try installing:"
echo " * deb: $PKG_DEB_NAME (Debian, Ubuntu, etc)"
echo " * rpm: $PKG_RPM_NAME (Fedora, EPEL)"
echo " * csw: $PKG_CSW_NAME (Solaris)"
echo " * brew: $PKG_BREW_NAME (OSX)"
echo "If $PKG_CONFIG_NAME is already installed, check that 'pkg-config' is in your"
echo "PATH and PKG_CONFIG_PATH contains a $PKG_CONFIG_NAME.pc file. If pkg-config"
echo "is unavailable you can set INCLUDE_DIR and LIB_DIR manually via:"
echo "R CMD INSTALL --configure-vars='INCLUDE_DIR=... LIB_DIR=...'"
echo "-------------------------- [ERROR MESSAGE] ---------------------------"
cat configure.log
echo "--------------------------------------------------------------------"
exit 1
fi
# Write to Makevars
sed -e "s|@cflags@|$PKG_CFLAGS|" -e "s|@libs@|$PKG_LIBS|" src/Makevars.in > src/Makevars
# Success
exit 0