From 4785bd6153da1b80f6da6442cdeb88359655b7cb Mon Sep 17 00:00:00 2001 From: Brad King Date: Thu, 18 Jun 2020 15:48:40 -0400 Subject: CUDA: Skip the entire search for nvcc when it is CMAKE_CUDA_COMPILER --- Modules/CMakeDetermineCUDACompiler.cmake | 160 +++++++++++++++---------------- 1 file changed, 80 insertions(+), 80 deletions(-) diff --git a/Modules/CMakeDetermineCUDACompiler.cmake b/Modules/CMakeDetermineCUDACompiler.cmake index 335305e..cb280f6 100644 --- a/Modules/CMakeDetermineCUDACompiler.cmake +++ b/Modules/CMakeDetermineCUDACompiler.cmake @@ -77,98 +77,98 @@ if(NOT CMAKE_CUDA_COMPILER_ID_RUN) # For NVCC we can easily deduce the SDK binary directory from the compiler path. if(CMAKE_CUDA_COMPILER_ID STREQUAL "NVIDIA") set(_CUDA_NVCC_EXECUTABLE "${CMAKE_CUDA_COMPILER}") - endif() - - # Search using CUDAToolkit_ROOT and then CUDA_PATH for equivalence with FindCUDAToolkit. - # In FindCUDAToolkit CUDAToolkit_ROOT is searched automatically due to being in a find_package(). - # First we search candidate non-default paths to give them priority. - find_program(_CUDA_NVCC_EXECUTABLE - NAMES nvcc nvcc.exe - PATHS ${CUDAToolkit_ROOT} - ENV CUDAToolkit_ROOT - ENV CUDA_PATH - PATH_SUFFIXES bin - NO_DEFAULT_PATH - ) - - # If we didn't find NVCC, then try the default paths. - find_program(_CUDA_NVCC_EXECUTABLE - NAMES nvcc nvcc.exe - PATH_SUFFIXES bin - ) + else() + # Search using CUDAToolkit_ROOT and then CUDA_PATH for equivalence with FindCUDAToolkit. + # In FindCUDAToolkit CUDAToolkit_ROOT is searched automatically due to being in a find_package(). + # First we search candidate non-default paths to give them priority. + find_program(_CUDA_NVCC_EXECUTABLE + NAMES nvcc nvcc.exe + PATHS ${CUDAToolkit_ROOT} + ENV CUDAToolkit_ROOT + ENV CUDA_PATH + PATH_SUFFIXES bin + NO_DEFAULT_PATH + ) - # If the user specified CUDAToolkit_ROOT but nvcc could not be found, this is an error. - if(NOT _CUDA_NVCC_EXECUTABLE AND (DEFINED CUDAToolkit_ROOT OR DEFINED ENV{CUDAToolkit_ROOT})) - set(fail_base "Could not find nvcc executable in path specified by") + # If we didn't find NVCC, then try the default paths. + find_program(_CUDA_NVCC_EXECUTABLE + NAMES nvcc nvcc.exe + PATH_SUFFIXES bin + ) - if(DEFINED CUDAToolkit_ROOT) - message(FATAL_ERROR "${fail_base} CUDAToolkit_ROOT=${CUDAToolkit_ROOT}") - elseif(DEFINED ENV{CUDAToolkit_ROOT}) - message(FATAL_ERROR "${fail_base} environment variable CUDAToolkit_ROOT=$ENV{CUDAToolkit_ROOT}") - endif() - endif() + # If the user specified CUDAToolkit_ROOT but nvcc could not be found, this is an error. + if(NOT _CUDA_NVCC_EXECUTABLE AND (DEFINED CUDAToolkit_ROOT OR DEFINED ENV{CUDAToolkit_ROOT})) + set(fail_base "Could not find nvcc executable in path specified by") - # CUDAToolkit_ROOT cmake/env variable not specified, try platform defaults. - # - # - Linux: /usr/local/cuda-X.Y - # - macOS: /Developer/NVIDIA/CUDA-X.Y - # - Windows: C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA\vX.Y - # - # We will also search the default symlink location /usr/local/cuda first since - # if CUDAToolkit_ROOT is not specified, it is assumed that the symlinked - # directory is the desired location. - if(NOT _CUDA_NVCC_EXECUTABLE) - if(UNIX) - if(NOT APPLE) - set(platform_base "/usr/local/cuda-") - else() - set(platform_base "/Developer/NVIDIA/CUDA-") + if(DEFINED CUDAToolkit_ROOT) + message(FATAL_ERROR "${fail_base} CUDAToolkit_ROOT=${CUDAToolkit_ROOT}") + elseif(DEFINED ENV{CUDAToolkit_ROOT}) + message(FATAL_ERROR "${fail_base} environment variable CUDAToolkit_ROOT=$ENV{CUDAToolkit_ROOT}") endif() - else() - set(platform_base "C:\\Program Files\\NVIDIA GPU Computing Toolkit\\CUDA\\v") endif() - # Build out a descending list of possible cuda installations, e.g. - file(GLOB possible_paths "${platform_base}*") - # Iterate the glob results and create a descending list. - set(versions) - foreach(p ${possible_paths}) - # Extract version number from end of string - string(REGEX MATCH "[0-9][0-9]?\\.[0-9]$" p_version ${p}) - if(IS_DIRECTORY ${p} AND p_version) - list(APPEND versions ${p_version}) + # CUDAToolkit_ROOT cmake/env variable not specified, try platform defaults. + # + # - Linux: /usr/local/cuda-X.Y + # - macOS: /Developer/NVIDIA/CUDA-X.Y + # - Windows: C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA\vX.Y + # + # We will also search the default symlink location /usr/local/cuda first since + # if CUDAToolkit_ROOT is not specified, it is assumed that the symlinked + # directory is the desired location. + if(NOT _CUDA_NVCC_EXECUTABLE) + if(UNIX) + if(NOT APPLE) + set(platform_base "/usr/local/cuda-") + else() + set(platform_base "/Developer/NVIDIA/CUDA-") + endif() + else() + set(platform_base "C:\\Program Files\\NVIDIA GPU Computing Toolkit\\CUDA\\v") endif() - endforeach() - # Sort numerically in descending order, so we try the newest versions first. - list(SORT versions COMPARE NATURAL ORDER DESCENDING) + # Build out a descending list of possible cuda installations, e.g. + file(GLOB possible_paths "${platform_base}*") + # Iterate the glob results and create a descending list. + set(versions) + foreach(p ${possible_paths}) + # Extract version number from end of string + string(REGEX MATCH "[0-9][0-9]?\\.[0-9]$" p_version ${p}) + if(IS_DIRECTORY ${p} AND p_version) + list(APPEND versions ${p_version}) + endif() + endforeach() - # With a descending list of versions, populate possible paths to search. - set(search_paths) - foreach(v ${versions}) - list(APPEND search_paths "${platform_base}${v}") - endforeach() + # Sort numerically in descending order, so we try the newest versions first. + list(SORT versions COMPARE NATURAL ORDER DESCENDING) - # Force the global default /usr/local/cuda to the front on Unix. - if(UNIX) - list(INSERT search_paths 0 "/usr/local/cuda") - endif() + # With a descending list of versions, populate possible paths to search. + set(search_paths) + foreach(v ${versions}) + list(APPEND search_paths "${platform_base}${v}") + endforeach() - # Now search for nvcc again using the platform default search paths. - find_program(_CUDA_NVCC_EXECUTABLE - NAMES nvcc nvcc.exe - PATHS ${search_paths} - PATH_SUFFIXES bin - ) - - # We are done with these variables now, cleanup. - unset(platform_base) - unset(possible_paths) - unset(versions) - unset(search_paths) + # Force the global default /usr/local/cuda to the front on Unix. + if(UNIX) + list(INSERT search_paths 0 "/usr/local/cuda") + endif() - if(NOT _CUDA_NVCC_EXECUTABLE) - message(FATAL_ERROR "Could not find nvcc, please set CUDAToolkit_ROOT.") + # Now search for nvcc again using the platform default search paths. + find_program(_CUDA_NVCC_EXECUTABLE + NAMES nvcc nvcc.exe + PATHS ${search_paths} + PATH_SUFFIXES bin + ) + + # We are done with these variables now, cleanup. + unset(platform_base) + unset(possible_paths) + unset(versions) + unset(search_paths) + + if(NOT _CUDA_NVCC_EXECUTABLE) + message(FATAL_ERROR "Could not find nvcc, please set CUDAToolkit_ROOT.") + endif() endif() endif() -- cgit v0.12 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 
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//! [0]
QGLFormat fmt;
fmt.setAlpha(true);
fmt.setStereo(true);
QGLFormat::setDefaultFormat(fmt);
//! [0]


//! [1]
QGLFormat fmt;
fmt.setDoubleBuffer(false);                 // single buffer
fmt.setDirectRendering(false);              // software rendering
MyGLWidget* myWidget = new MyGLWidget(fmt, ...);
//! [1]


//! [2]
QGLFormat fmt;
fmt.setOverlay(true);
fmt.setStereo(true);
MyGLWidget* myWidget = new MyGLWidget(fmt, ...);
if (!myWidget->format().stereo()) {
    // ok, goggles off
    if (!myWidget->format().hasOverlay()) {
        qFatal("Cool hardware required");
    }
}
//! [2]


//! [3]
// The rendering in MyGLWidget depends on using
// stencil buffer and alpha channel
MyGLWidget::MyGLWidget(QWidget* parent)
    : QGLWidget(QGLFormat(QGL::StencilBuffer | QGL::AlphaChannel), parent)
{
    if (!format().stencil())
        qWarning("Could not get stencil buffer; results will be suboptimal");
    if (!format().alpha())
        qWarning("Could not get alpha channel; results will be suboptimal");
    ...
}
//! [3]


//! [4]
QApplication a(argc, argv);
QGLFormat f;
f.setDoubleBuffer(false);
QGLFormat::setDefaultFormat(f);
//! [4]


//! [5]
QGLFormat f = QGLFormat::defaultOverlayFormat();
f.setDoubleBuffer(true);
QGLFormat::setDefaultOverlayFormat(f);
//! [5]


//! [6]
// ...continued from above
MyGLWidget* myWidget = new MyGLWidget(QGLFormat(QGL::HasOverlay), ...);
if (myWidget->format().hasOverlay()) {
    // Yes, we got an overlay, let's check _its_ format:
    QGLContext* olContext = myWidget->overlayContext();
    if (olContext->format().doubleBuffer())
        ; // yes, we got a double buffered overlay
    else
        ; // no, only single buffered overlays are available
}
//! [6]


//! [7]
QGLContext *cx;
//  ...
QGLFormat f;
f.setStereo(true);
cx->setFormat(f);
if (!cx->create())
    exit(); // no OpenGL support, or cannot render on the specified paintdevice
if (!cx->format().stereo())
    exit(); // could not create stereo context
//! [7]


//! [8]
class MyGLDrawer : public QGLWidget
{
    Q_OBJECT        // must include this if you use Qt signals/slots

public:
    MyGLDrawer(QWidget *parent)
        : QGLWidget(parent) {}

protected:

    void initializeGL()
    {
        // Set up the rendering context, define display lists etc.:
        ...
        glClearColor(0.0, 0.0, 0.0, 0.0);
        glEnable(GL_DEPTH_TEST);
        ...
    }

    void resizeGL(int w, int h)
    {
        // setup viewport, projection etc.:
        glViewport(0, 0, (GLint)w, (GLint)h);
        ...
        glFrustum(...);
        ...
    }

    void paintGL()
    {
        // draw the scene:
        ...
        glRotatef(...);
        glMaterialfv(...);
        glBegin(GL_QUADS);
        glVertex3f(...);
        glVertex3f(...);
        ...
        glEnd();
        ...
    }

};
//! [8]
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