src/backends/drm/drm_qpainter_layer.cpp:54:79: error: use of undeclared identifier 'errno'

        qCWarning(KWIN_DRM, "Failed to create dumb framebuffer: %s", strerror(errno));

                                                                              ^

src/backends/drm/drm_qpainter_layer.cpp:66:87: error: use of undeclared identifier 'errno'

                qCWarning(KWIN_DRM, "Failed to create dumb framebuffer: %s", strerror(errno));

                                                                                      ^

src/backends/drm/drm_qpainter_layer.cpp:121:94: error: use of undeclared identifier 'errno'

        qCWarning(KWIN_DRM, "Failed to create dumb framebuffer for the cursor: %s", strerror(errno));

                                                                                             ^

--- src/backends/drm/drm_qpainter_layer.cpp.orig	2023-01-03 18:08:37 UTC

+++ src/backends/drm/drm_qpainter_layer.cpp

@@ -19,6 +19,7 @@

 #include "drm_qpainter_backend.h"

 #include "drm_virtual_output.h"

+#include <cerrno>

 #include <drm_fourcc.h>

 namespace KWin

FreeBSD < 13 lacks https://cgit.freebsd.org/src/commit/?id=af755d3e4859

src/utils/ramfile.cpp:57:117: error: use of undeclared identifier 'errno'

        qCWarning(KWIN_CORE).nospace() << name << ": Failed to remove temporary file from filesystem: " << strerror(errno);

                                                                                                                    ^

src/utils/ramfile.cpp:80:17: error: use of undeclared identifier 'F_SEAL_SHRINK'

    int seals = F_SEAL_SHRINK | F_SEAL_GROW | F_SEAL_SEAL;

                ^

src/utils/ramfile.cpp:80:33: error: use of undeclared identifier 'F_SEAL_GROW'

    int seals = F_SEAL_SHRINK | F_SEAL_GROW | F_SEAL_SEAL;

                                ^

src/utils/ramfile.cpp:80:47: error: use of undeclared identifier 'F_SEAL_SEAL'

    int seals = F_SEAL_SHRINK | F_SEAL_GROW | F_SEAL_SEAL;

                                              ^

src/utils/ramfile.cpp:82:18: error: use of undeclared identifier 'F_SEAL_WRITE'

        seals |= F_SEAL_WRITE;

                 ^

src/utils/ramfile.cpp:85:21: error: use of undeclared identifier 'F_ADD_SEALS'

    if (fcntl(fd(), F_ADD_SEALS, seals) != 0) {

                    ^

src/utils/ramfile.cpp:139:35: error: use of undeclared identifier 'F_GET_SEALS'

    const int seals = fcntl(fd(), F_GET_SEALS);

                                  ^

src/utils/ramfile.cpp:141:21: error: use of undeclared identifier 'F_SEAL_WRITE'

        if (seals & F_SEAL_WRITE) {

                    ^

--- src/utils/ramfile.cpp.orig	2023-01-03 18:08:37 UTC

+++ src/utils/ramfile.cpp

@@ -16,6 +16,7 @@

 #include <fcntl.h>

 #include <sys/mman.h>

 #include <unistd.h>

+#include <cerrno>

 #include <utility>

 namespace KWin

@@ -77,6 +78,7 @@ RamFile::RamFile(const char *name, const void *inData,

     m_tmp->unmap(data);

 #endif

+#ifdef F_SEAL_SEAL

     int seals = F_SEAL_SHRINK | F_SEAL_GROW | F_SEAL_SEAL;

     if (flags.testFlag(RamFile::Flag::SealWrite)) {

         seals |= F_SEAL_WRITE;

@@ -85,6 +87,7 @@ RamFile::RamFile(const char *name, const void *inData,

     if (fcntl(fd(), F_ADD_SEALS, seals) != 0) {

         qCDebug(KWIN_CORE).nospace() << name << ": Failed to seal RamFile: " << strerror(errno);

     }

+#endif

     guard.dismiss();

 }

@@ -136,12 +139,14 @@ RamFile::Flags RamFile::effectiveFlags() const

 {

     Flags flags = {};

+#ifdef F_SEAL_SEAL

     const int seals = fcntl(fd(), F_GET_SEALS);

     if (seals > 0) {

         if (seals & F_SEAL_WRITE) {

             flags.setFlag(Flag::SealWrite);

         }

     }

+#endif

     return flags;

 }