Neither Qt 4.8.6 nor 5.5.1 found. Compilation finishes without error, but not rstudio executable created

kevinushey · August 31, 2018, 4:24pm

This is the script we use when generating package builds of RStudio:

rstudio/rstudio/blob/master/package/linux/make-package

#!/usr/bin/env bash

set -e

# remember cwd for later restoration
PREV_WD=$(pwd)

# raise the limit on number of open files
ulimit -n 2048

PACKAGE_DIR=`pwd`

if [ "$1" != "Desktop" ] && [ "$1" != "Server" ]
then
   echo "error: must specify Desktop or Server as configuration"
   exit 1
fi

if [ "$2" != "DEB" ] && [ "$2" != "RPM" ]
then

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In particular, note how we invoke CMake:

cmake -DRSTUDIO_TARGET=$1 \
      -DCMAKE_BUILD_TYPE=$CMAKE_BUILD_TYPE \
      -DRSTUDIO_PACKAGE_BUILD=1 \
      -DRSTUDIO_PACKAGE_VARIANT=$4 \
      -DCMAKE_INSTALL_PREFIX="${CMAKE_INSTALL_PREFIX}" \
      -DGWT_BIN_DIR="$BUILD_DIR/gwt/bin" \
      -DGWT_WWW_DIR="$BUILD_DIR/gwt/www" \
      -DGWT_EXTRAS_DIR="$BUILD_DIR/gwt/extras" \
      $PKG_DIR/../..

The -DRSTUDIO_PACKAGE_BUILD tells RStudio to build against + use the bundled Qt. If that's not set, then you need to tell RStudio where Qt lives. See e.g.

github.com

rstudio/rstudio/blob/39c3fdb1f70cde50ad79f6d0a24395d38263d368/src/cpp/desktop/CMakeLists.txt#L24-L96


# on unix prefer qtsdk installs over system-level libraries. note this
# can be overriden by defining QT_QMAKE_EXECUTABLE when invoking cmake
if(NOT WIN32)
# prefer rstudio qtsdk install then home qtsdk install
if(NOT QT_QMAKE_EXECUTABLE)
   if(APPLE)
      set(QT_COMPILER "clang_64")
   else()
      # Qt named compiler folder varies by platform
      if(CMAKE_SIZEOF_VOID_P EQUAL 8)
        set(QT_COMPILER "gcc_64")
      else()
        set(QT_COMPILER "gcc")
      endif()
   endif()
      
   if(APPLE)
      set(QT_CANDIDATES 5.11.1)   
   else()
      set(QT_CANDIDATES 5.11.1 5.10.1)

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In particular you probably need to set the QT_QMAKE_EXECUTABLE variable.

It's highly recommended that you use the bundled version of Qt, as different bugs and regressions affecting RStudio do pop up in the different Qt releases, and we only test explicitly against the bundled versions of Qt we explicitly prepare our releases against.