diff -Nru digikam-5.7.0/debian/changelog digikam-5.7.0/debian/changelog
--- digikam-5.7.0/debian/changelog	2017-11-14 02:45:48.000000000 +0000
+++ digikam-5.7.0/debian/changelog	2018-04-11 21:03:20.000000000 +0000
@@ -1,3 +1,13 @@
+digikam (4:5.7.0-2+rpi1) buster-staging; urgency=medium
+
+  * Reduce dependency versioning on libexiv2-dev from (>= 0.26) to (>= 0.25)
+    in both debian/control and in core/CMakelists.txt
+  * Fix clean target
+  * Apply some upstream commits to fix build with new kcalcore.
+  * rename powf64 to libraw_powf64 to fix conflict with kernel headers.
+
+ -- Peter Michael Green <plugwash@raspbian.org>  Wed, 11 Apr 2018 21:03:20 +0000
+
 digikam (4:5.7.0-2) experimental; urgency=medium
 
   * Build with qtav, for video playback functionality.
diff -Nru digikam-5.7.0/debian/control digikam-5.7.0/debian/control
--- digikam-5.7.0/debian/control	2017-11-14 02:45:48.000000000 +0000
+++ digikam-5.7.0/debian/control	2018-04-11 21:03:20.000000000 +0000
@@ -14,7 +14,7 @@
                help2man,
                libboost-graph-dev,
                libeigen3-dev (>= 3.1.2),
-               libexiv2-dev (>= 0.26),
+               libexiv2-dev (>= 0.25),
                libexpat1-dev | libexpat-dev,
                libgphoto2-dev,
                libjpeg-dev,
diff -Nru digikam-5.7.0/debian/patches/kcalcore-fixes.patch digikam-5.7.0/debian/patches/kcalcore-fixes.patch
--- digikam-5.7.0/debian/patches/kcalcore-fixes.patch	1970-01-01 00:00:00.000000000 +0000
+++ digikam-5.7.0/debian/patches/kcalcore-fixes.patch	2018-04-11 21:03:20.000000000 +0000
@@ -0,0 +1,106 @@
+This patch combines upstream commits 12ab7af4618f10d39d4a977e00a0e68a3aac9bd2 dad750fadc926b62603cc9d64009ee5072a46d97 and d204022e191d9377874689bfe4c89f7b83998188
+
+Modified to apply to the Debian package by Peter Michael Green.
+
+Hopefully it will fix the build with the new kcalcore.
+
+commit 12ab7af4618f10d39d4a977e00a0e68a3aac9bd2
+Author: Simon Frei <freisim93@gmail.com>
+Date:   Wed Sep 13 15:43:49 2017 +0200
+
+    calendar: Adjust to new KCalCore API (fixes CI)
+
+commit dad750fadc926b62603cc9d64009ee5072a46d97
+Author: Daniel Vrátil <dvratil@kde.org>
+Date:   Wed Sep 13 16:51:14 2017 +0200
+
+    Adapt to KCalCore API changes
+
+    This change supports both old (pre-QDateTime) and new version.
+
+    Differential Revision: https://phabricator.kde.org/D7802
+
+commit d204022e191d9377874689bfe4c89f7b83998188
+Author: Simon Frei <freisim93@gmail.com>
+Date:   Wed Sep 13 18:44:39 2017 +0200
+
+    fix calendar warning (build will pass when CI gets new version of calendar)
+
+Index: digikam-5.7.0/core/utilities/assistants/calendar/print/calsettings.cpp
+===================================================================
+--- digikam-5.7.0.orig/core/utilities/assistants/calendar/print/calsettings.cpp
++++ digikam-5.7.0/core/utilities/assistants/calendar/print/calsettings.cpp
+@@ -31,12 +31,17 @@
+ #include "digikam_debug.h"
+ #include "calsystem.h"
+ 
+-// KCalCore includes
+ 
+ #ifdef HAVE_KCALENDAR
++    // KCalCore includes
++
+ #   include <kcalcore/icalformat.h>
+ #   include <kcalcore/filestorage.h>
+ #   include <kcalcore/memorycalendar.h>
++
++    // Qt includes
++
++#   include <QTimeZone>
+ #endif // HAVE_KCALENDAR
+ 
+ namespace Digikam
+@@ -290,7 +295,13 @@ void CalSettings::loadSpecial(const QUrl
+         return;
+     }
+ 
++#ifdef HAVE_KCALENDAR_QDATETIME
++    KCalCore::MemoryCalendar::Ptr memCal(new KCalCore::MemoryCalendar(QTimeZone::utc()));
++    using DateTime = QDateTime;
++#else
+     KCalCore::MemoryCalendar::Ptr memCal(new KCalCore::MemoryCalendar(QString::fromLatin1("UTC")));
++    using DateTime = KDateTime;
++#endif
+     KCalCore::FileStorage::Ptr fileStorage(new KCalCore::FileStorage(memCal, url.toLocalFile(), new KCalCore::ICalFormat));
+ 
+     qCDebug(DIGIKAM_GENERAL_LOG) << "Loading calendar from file " << url.toLocalFile();
+@@ -308,9 +319,9 @@ void CalSettings::loadSpecial(const QUrl
+         qLast  = calSys.date(params.year + 1, 1, 1);
+         qLast  = qLast.addDays(-1);
+ 
+-        KDateTime dtFirst(qFirst);
+-        KDateTime dtLast(qLast);
+-        KDateTime dtCurrent;
++        DateTime dtFirst(qFirst, QTime(0, 0));
++        DateTime dtLast(qLast, QTime(0, 0));
++        DateTime dtCurrent;
+ 
+         int counter                = 0;
+         KCalCore::Event::List list = memCal->rawEvents(qFirst, qLast);
+Index: digikam-5.7.0/core/CMakeLists.txt
+===================================================================
+--- digikam-5.7.0.orig/core/CMakeLists.txt
++++ digikam-5.7.0/core/CMakeLists.txt
+@@ -174,6 +174,9 @@ find_package(KF5 ${CALENDAR_MIN_VERSION}
+              OPTIONAL_COMPONENTS
+              CalendarCore           # For Calendar tool.
+ )
++if ("${KF5CalendarCore_VERSION}" VERSION_GREATER 5.6.40)
++    set(HAVE_KCALENDAR_QDATETIME TRUE)
++endif()
+ 
+ if(ENABLE_AKONADICONTACTSUPPORT AND NOT KF5AkonadiContact_FOUND)
+     set(ENABLE_KFILEMETADATASUPPORT OFF)
+Index: digikam-5.7.0/core/app/utils/digikam_config.h.cmake.in
+===================================================================
+--- digikam-5.7.0.orig/core/app/utils/digikam_config.h.cmake.in
++++ digikam-5.7.0/core/app/utils/digikam_config.h.cmake.in
+@@ -75,6 +75,9 @@
+ /* Define to 1 if you have KCalendar core shared libraries installed */
+ #cmakedefine HAVE_KCALENDAR 1
+ 
++/* Define to 1 if you have KCalendar core shared libraries with QDateTime support installed */
++#cmakedefine HAVE_KCALENDAR_QDATETIME 1
++
+ /* Define to 1 if Panorama tool is supported */
+ #cmakedefine HAVE_PANORAMA 1
+ 
diff -Nru digikam-5.7.0/debian/patches/libraw_powf64.patch digikam-5.7.0/debian/patches/libraw_powf64.patch
--- digikam-5.7.0/debian/patches/libraw_powf64.patch	1970-01-01 00:00:00.000000000 +0000
+++ digikam-5.7.0/debian/patches/libraw_powf64.patch	2018-04-11 21:03:20.000000000 +0000
@@ -0,0 +1,337 @@
+Description: rename powf64 to libraw_powf64
+ Replace powf64 by libraw_powf64 to avoid a conflict with recent kernel headers.
+
+ This mirrors what upstream did, but I did not bother to search for the upstream commit,
+ I just did my own search and replace.
+Author: Peter Michael Green <plugwash@raspbian.org>
+Last-Update: 2018-04-12
+
+--- digikam-5.7.0.orig/core/libs/rawengine/libraw/internal/dcraw_common.cpp
++++ digikam-5.7.0/core/libs/rawengine/libraw/internal/dcraw_common.cpp
+@@ -5749,7 +5749,7 @@ static float powf_lim(float a, float b,
+ {
+   return (b>limup || b < -limup)?0.f:powf(a,b);
+ }
+-static float powf64(float a, float b)
++static float libraw_powf64(float a, float b)
+ {
+   return powf_lim(a,b,64.f);
+ }
+@@ -5773,7 +5773,7 @@ static float my_roundf(float x) {
+ static float _CanonConvertAperture(ushort in)
+ {
+   if ((in == (ushort)0xffe0) || (in == (ushort)0x7fff)) return 0.0f;
+-  return powf64(2.0, in/64.0);
++  return libraw_powf64(2.0, in/64.0);
+ }
+ 
+ static float _CanonConvertEV (short in)
+@@ -6235,21 +6235,21 @@ void CLASS processNikonLensData (uchar *
+     if (fabsf(imgdata.lens.makernotes.MinFocal) < 1.1f)
+     {
+       if ((imgdata.lens.nikon.NikonLensType ^ (uchar)0x01) || LensData[i + 2])
+-        imgdata.lens.makernotes.MinFocal = 5.0f * powf64(2.0f, (float)LensData[i + 2] / 24.0f);
++        imgdata.lens.makernotes.MinFocal = 5.0f * libraw_powf64(2.0f, (float)LensData[i + 2] / 24.0f);
+       if ((imgdata.lens.nikon.NikonLensType ^ (uchar)0x01) || LensData[i + 3])
+-        imgdata.lens.makernotes.MaxFocal = 5.0f * powf64(2.0f, (float)LensData[i + 3] / 24.0f);
++        imgdata.lens.makernotes.MaxFocal = 5.0f * libraw_powf64(2.0f, (float)LensData[i + 3] / 24.0f);
+       if ((imgdata.lens.nikon.NikonLensType ^ (uchar)0x01) || LensData[i + 4])
+-        imgdata.lens.makernotes.MaxAp4MinFocal = powf64(2.0f, (float)LensData[i + 4] / 24.0f);
++        imgdata.lens.makernotes.MaxAp4MinFocal = libraw_powf64(2.0f, (float)LensData[i + 4] / 24.0f);
+       if ((imgdata.lens.nikon.NikonLensType ^ (uchar)0x01) || LensData[i + 5])
+-        imgdata.lens.makernotes.MaxAp4MaxFocal = powf64(2.0f, (float)LensData[i + 5] / 24.0f);
++        imgdata.lens.makernotes.MaxAp4MaxFocal = libraw_powf64(2.0f, (float)LensData[i + 5] / 24.0f);
+     }
+     imgdata.lens.nikon.NikonMCUVersion = LensData[i + 6];
+     if (i != 2)
+       {
+         if ((LensData[i - 1]) &&
+             (fabsf(imgdata.lens.makernotes.CurFocal) < 1.1f))
+-          imgdata.lens.makernotes.CurFocal = 5.0f * powf64(2.0f, (float)LensData[i - 1] / 24.0f);
+-        if (LensData[i + 7]) imgdata.lens.nikon.NikonEffectiveMaxAp = powf64(2.0f, (float)LensData[i + 7] / 24.0f);
++          imgdata.lens.makernotes.CurFocal = 5.0f * libraw_powf64(2.0f, (float)LensData[i - 1] / 24.0f);
++        if (LensData[i + 7]) imgdata.lens.nikon.NikonEffectiveMaxAp = libraw_powf64(2.0f, (float)LensData[i + 7] / 24.0f);
+       }
+     imgdata.lens.makernotes.LensID =
+       (unsigned long long) LensData[i] << 56 |
+@@ -6726,13 +6726,13 @@ void CLASS PentaxLensInfo (unsigned id,
+ 		if (table_buf[iLensData+9] &&
+ 			(fabs(imgdata.lens.makernotes.CurFocal) < 0.1f))
+ 		  imgdata.lens.makernotes.CurFocal =
+-			10*(table_buf[iLensData+9]>>2) * powf64(4, (table_buf[iLensData+9] & 0x03)-2);
++			10*(table_buf[iLensData+9]>>2) * libraw_powf64(4, (table_buf[iLensData+9] & 0x03)-2);
+ 		if (table_buf[iLensData+10] & 0xf0)
+ 		  imgdata.lens.makernotes.MaxAp4CurFocal =
+-			powf64(2.0f, (float)((table_buf[iLensData+10] & 0xf0) >>4)/4.0f);
++			libraw_powf64(2.0f, (float)((table_buf[iLensData+10] & 0xf0) >>4)/4.0f);
+ 		if (table_buf[iLensData+10] & 0x0f)
+ 		  imgdata.lens.makernotes.MinAp4CurFocal =
+-			powf64(2.0f, (float)((table_buf[iLensData+10] & 0x0f) + 10)/4.0f);
++			libraw_powf64(2.0f, (float)((table_buf[iLensData+10] & 0x0f) + 10)/4.0f);
+ 
+ 		if (iLensData != 12)
+ 		  {
+@@ -6753,14 +6753,14 @@ void CLASS PentaxLensInfo (unsigned id,
+ 			if ((table_buf[iLensData+14] > 1) &&
+ 				(fabs(imgdata.lens.makernotes.MaxAp4CurFocal) < 0.7f))
+ 			  imgdata.lens.makernotes.MaxAp4CurFocal =
+-				powf64(2.0f, (float)((table_buf[iLensData+14] & 0x7f) -1)/32.0f);
++				libraw_powf64(2.0f, (float)((table_buf[iLensData+14] & 0x7f) -1)/32.0f);
+ 		  }
+ 		else if ((id != 0x12e76) &&	// K-5
+ 				 (table_buf[iLensData+15] > 1) &&
+ 				 (fabs(imgdata.lens.makernotes.MaxAp4CurFocal) < 0.7f))
+ 		  {
+ 			imgdata.lens.makernotes.MaxAp4CurFocal =
+-			  powf64(2.0f, (float)((table_buf[iLensData+15] & 0x7f) -1)/32.0f);
++			  libraw_powf64(2.0f, (float)((table_buf[iLensData+15] & 0x7f) -1)/32.0f);
+ 		  }
+ 	  }
+ 	free(table_buf);
+@@ -7248,11 +7248,11 @@ void CLASS process_Sony_0x9050 (uchar *
+     {
+       if (buf[0])
+         imgdata.lens.makernotes.MaxAp4CurFocal =
+-          my_roundf(powf64(2.0f, ((float)SonySubstitution[buf[0]] / 8.0 - 1.06f) / 2.0f)*10.0f) / 10.0f;
++          my_roundf(libraw_powf64(2.0f, ((float)SonySubstitution[buf[0]] / 8.0 - 1.06f) / 2.0f)*10.0f) / 10.0f;
+ 
+       if (buf[1])
+         imgdata.lens.makernotes.MinAp4CurFocal =
+-          my_roundf(powf64(2.0f, ((float)SonySubstitution[buf[1]] / 8.0 - 1.06f) / 2.0f)*10.0f) / 10.0f;
++          my_roundf(libraw_powf64(2.0f, ((float)SonySubstitution[buf[1]] / 8.0 - 1.06f) / 2.0f)*10.0f) / 10.0f;
+     }
+ 
+   if (imgdata.lens.makernotes.CameraMount != LIBRAW_MOUNT_FixedLens)
+@@ -7262,7 +7262,7 @@ void CLASS process_Sony_0x9050 (uchar *
+           lid = SonySubstitution[buf[0x3d]] << 8 |
+             SonySubstitution[buf[0x3c]];
+           imgdata.lens.makernotes.CurAp =
+-            powf64(2.0f, ((float)lid/256.0f - 16.0f) / 2.0f);
++            libraw_powf64(2.0f, ((float)lid/256.0f - 16.0f) / 2.0f);
+         }
+       if (buf[0x105] &&
+           (imgdata.lens.makernotes.LensMount != LIBRAW_MOUNT_Canon_EF) &&
+@@ -7648,7 +7648,7 @@ void CLASS parse_makernote_0xc634(int ba
+           {
+             unsigned char cc;
+             fread(&cc, 1, 1, ifp);
+-            iso_speed = (int)(100.0 * powf64(2.0, (double)(cc) / 12.0 - 5.0));
++            iso_speed = (int)(100.0 * libraw_powf64(2.0, (double)(cc) / 12.0 - 5.0));
+             break;
+           }
+       }
+@@ -7693,7 +7693,7 @@ void CLASS parse_makernote_0xc634(int ba
+           }
+           break;
+         case 0x1002:
+-          imgdata.lens.makernotes.CurAp = powf64(2.0f, getreal(type)/2);
++          imgdata.lens.makernotes.CurAp = libraw_powf64(2.0f, getreal(type)/2);
+           break;
+         case 0x20100102:
+             stmread(imgdata.shootinginfo.InternalBodySerial, len, ifp);
+@@ -7720,10 +7720,10 @@ void CLASS parse_makernote_0xc634(int ba
+           stmread(imgdata.lens.makernotes.Lens,len, ifp);
+           break;
+         case 0x20100205:
+-          imgdata.lens.makernotes.MaxAp4MinFocal = powf64(sqrt(2.0f), get2() / 256.0f);
++          imgdata.lens.makernotes.MaxAp4MinFocal = libraw_powf64(sqrt(2.0f), get2() / 256.0f);
+           break;
+         case 0x20100206:
+-          imgdata.lens.makernotes.MaxAp4MaxFocal = powf64(sqrt(2.0f), get2() / 256.0f);
++          imgdata.lens.makernotes.MaxAp4MaxFocal = libraw_powf64(sqrt(2.0f), get2() / 256.0f);
+           break;
+         case 0x20100207:
+           imgdata.lens.makernotes.MinFocal = (float)get2();
+@@ -7734,7 +7734,7 @@ void CLASS parse_makernote_0xc634(int ba
+             imgdata.lens.makernotes.MaxFocal = imgdata.lens.makernotes.MinFocal;
+           break;
+         case 0x2010020a:
+-          imgdata.lens.makernotes.MaxAp4CurFocal = powf64(sqrt(2.0f), get2() / 256.0f);
++          imgdata.lens.makernotes.MaxAp4CurFocal = libraw_powf64(sqrt(2.0f), get2() / 256.0f);
+           break;
+         case 0x20100301:
+           imgdata.lens.makernotes.TeleconverterID = fgetc(ifp) << 8;
+@@ -8043,7 +8043,7 @@ void CLASS parse_makernote_0xc634(int ba
+                   lid = (((ushort)table_buf[2])<<8) |
+                     ((ushort)table_buf[3]);
+                   imgdata.lens.makernotes.CurAp =
+-                    powf64(2.0f, ((float)lid/8.0f-1.0f)/2.0f);
++                    libraw_powf64(2.0f, ((float)lid/8.0f-1.0f)/2.0f);
+                 }
+               break;
+             case 1536:
+@@ -8574,7 +8574,7 @@ void CLASS parse_makernote (int base, in
+           }
+           break;
+         case 0x1002:
+-          imgdata.lens.makernotes.CurAp = powf64(2.0f, getreal(type)/2);
++          imgdata.lens.makernotes.CurAp = libraw_powf64(2.0f, getreal(type)/2);
+           break;
+         case 0x20401112:
+           imgdata.makernotes.olympus.OlympusCropID = get2();
+@@ -8608,10 +8608,10 @@ void CLASS parse_makernote (int base, in
+           stmread(imgdata.lens.makernotes.Lens, len, ifp);
+           break;
+         case 0x20100205:
+-          imgdata.lens.makernotes.MaxAp4MinFocal = powf64(sqrt(2.0f), get2() / 256.0f);
++          imgdata.lens.makernotes.MaxAp4MinFocal = libraw_powf64(sqrt(2.0f), get2() / 256.0f);
+           break;
+         case 0x20100206:
+-          imgdata.lens.makernotes.MaxAp4MaxFocal = powf64(sqrt(2.0f), get2() / 256.0f);
++          imgdata.lens.makernotes.MaxAp4MaxFocal = libraw_powf64(sqrt(2.0f), get2() / 256.0f);
+           break;
+         case 0x20100207:
+           imgdata.lens.makernotes.MinFocal = (float)get2();
+@@ -8622,7 +8622,7 @@ void CLASS parse_makernote (int base, in
+             imgdata.lens.makernotes.MaxFocal = imgdata.lens.makernotes.MinFocal;
+           break;
+         case 0x2010020a:
+-          imgdata.lens.makernotes.MaxAp4CurFocal = powf64(sqrt(2.0f), get2() / 256.0f);
++          imgdata.lens.makernotes.MaxAp4CurFocal = libraw_powf64(sqrt(2.0f), get2() / 256.0f);
+           break;
+         case 0x20100301:
+           imgdata.lens.makernotes.TeleconverterID = fgetc(ifp) << 8;
+@@ -9049,7 +9049,7 @@ void CLASS parse_makernote (int base, in
+                   lid = (((ushort)table_buf[2])<<8) |
+                     ((ushort)table_buf[3]);
+                   imgdata.lens.makernotes.CurAp =
+-                    powf64(2.0f, ((float)lid/8.0f-1.0f)/2.0f);
++                    libraw_powf64(2.0f, ((float)lid/8.0f-1.0f)/2.0f);
+                 }
+               break;
+             case 1536:
+@@ -9147,19 +9147,19 @@ void CLASS parse_makernote (int base, in
+       {
+         unsigned char cc;
+         fread(&cc,1,1,ifp);
+-        iso_speed = int(100.0 * powf64(2.0f,float(cc)/12.0-5.0));
++        iso_speed = int(100.0 * libraw_powf64(2.0f,float(cc)/12.0-5.0));
+       }
+     if (tag == 4 && len > 26 && len < 35) {
+       if ((i=(get4(),get2())) != 0x7fff && (!iso_speed || iso_speed == 65535))
+-	iso_speed = 50 * powf64(2.0, i/32.0 - 4);
++	iso_speed = 50 * libraw_powf64(2.0, i/32.0 - 4);
+ #ifdef LIBRAW_LIBRARY_BUILD
+       get4();
+ #else
+       if ((i=(get2(),get2())) != 0x7fff && !aperture)
+-	aperture = powf64(2.0, i/64.0);
++	aperture = libraw_powf64(2.0, i/64.0);
+ #endif
+       if ((i=get2()) != 0xffff && !shutter)
+-	shutter = powf64(2.0, (short) i/-32.0);
++	shutter = libraw_powf64(2.0, (short) i/-32.0);
+       wbi = (get2(),get2());
+       shot_order = (get2(),get2());
+     }
+@@ -9753,7 +9753,7 @@ void CLASS parse_exif (int base)
+         imgdata.lens.Lens[0] = 0;
+       break;
+     case 0x9205:
+-      imgdata.lens.EXIF_MaxAp = powf64(2.0f, (getreal(type) / 2.0f));
++      imgdata.lens.EXIF_MaxAp = libraw_powf64(2.0f, (getreal(type) / 2.0f));
+       break;
+ #endif
+       case 33434:  tiff_ifd[tiff_nifds-1].t_shutter =
+@@ -9768,11 +9768,11 @@ void CLASS parse_exif (int base)
+       case 36868:  get_timestamp(0);			break;
+       case 37377:  if ((expo = -getreal(type)) < 128 && shutter == 0.)
+ 		     tiff_ifd[tiff_nifds-1].t_shutter =
+-			shutter = powf64(2.0, expo);
++			shutter = libraw_powf64(2.0, expo);
+ 		break;
+       case 37378:                                       // 0x9202 ApertureValue
+         if ((fabs(ape = getreal(type))<256.0) && (!aperture))
+-          aperture = powf64(2.0, ape/2);
++          aperture = libraw_powf64(2.0, ape/2);
+         break;
+       case 37385:  flash_used = getreal(type);          break;
+       case 37386:  focal_len = getreal(type);		break;
+@@ -10668,7 +10668,7 @@ int CLASS parse_tiff_ifd (int base)
+         imgdata.lens.Lens[0] = 0;
+       break;
+     case 0x9205:
+-      imgdata.lens.EXIF_MaxAp = powf64(2.0f, (getreal(type) / 2.0f));
++      imgdata.lens.EXIF_MaxAp = libraw_powf64(2.0f, (getreal(type) / 2.0f));
+       break;
+ // IB end
+ #endif
+@@ -11703,22 +11703,22 @@ void CLASS parse_ciff (int offset, int l
+       thumb_length = len;
+     }
+     if (type == 0x1818) {
+-      shutter = powf64(2.0f, -int_to_float((get4(),get4())));
+-      aperture = powf64(2.0f, int_to_float(get4())/2);
++      shutter = libraw_powf64(2.0f, -int_to_float((get4(),get4())));
++      aperture = libraw_powf64(2.0f, int_to_float(get4())/2);
+ #ifdef LIBRAW_LIBRARY_BUILD
+       imgdata.lens.makernotes.CurAp = aperture;
+ #endif
+     }
+     if (type == 0x102a) {
+ //      iso_speed = pow (2.0, (get4(),get2())/32.0 - 4) * 50;
+-      iso_speed = powf64(2.0f, ((get2(),get2()) + get2())/32.0f - 5.0f) * 100.0f;
++      iso_speed = libraw_powf64(2.0f, ((get2(),get2()) + get2())/32.0f - 5.0f) * 100.0f;
+ #ifdef LIBRAW_LIBRARY_BUILD
+       aperture  = _CanonConvertAperture((get2(),get2()));
+       imgdata.lens.makernotes.CurAp = aperture;
+ #else
+-      aperture  = powf64(2.0, (get2(),(short)get2())/64.0);
++      aperture  = libraw_powf64(2.0, (get2(),(short)get2())/64.0);
+ #endif
+-      shutter   = powf64(2.0,-((short)get2())/32.0);
++      shutter   = libraw_powf64(2.0,-((short)get2())/32.0);
+       wbi = (get2(),get2());
+       if (wbi > 17) wbi = 0;
+       fseek (ifp, 32, SEEK_CUR);
+@@ -11923,8 +11923,8 @@ void CLASS parse_phase_one (int base)
+       setPhaseOneFeatures(unique_id);
+       break;
+     case 0x0401:
+-      if (type == 4) imgdata.lens.makernotes.CurAp =  powf64(2.0f, (int_to_float(data)/2.0f));
+-      else imgdata.lens.makernotes.CurAp = powf64(2.0f, (getreal(type)/2.0f));
++      if (type == 4) imgdata.lens.makernotes.CurAp =  libraw_powf64(2.0f, (int_to_float(data)/2.0f));
++      else imgdata.lens.makernotes.CurAp = libraw_powf64(2.0f, (getreal(type)/2.0f));
+       break;
+     case 0x0403:
+       if (type == 4) imgdata.lens.makernotes.CurFocal =  int_to_float(data);
+@@ -11938,16 +11938,16 @@ void CLASS parse_phase_one (int base)
+       break;
+     case 0x0414:
+       if (type == 4) {
+-      	imgdata.lens.makernotes.MaxAp4CurFocal = powf64(2.0f, (int_to_float(data)/2.0f));
++      	imgdata.lens.makernotes.MaxAp4CurFocal = libraw_powf64(2.0f, (int_to_float(data)/2.0f));
+       } else {
+-        imgdata.lens.makernotes.MaxAp4CurFocal = powf64(2.0f, (getreal(type) / 2.0f));
++        imgdata.lens.makernotes.MaxAp4CurFocal = libraw_powf64(2.0f, (getreal(type) / 2.0f));
+       }
+       break;
+     case 0x0415:
+       if (type == 4) {
+-      	imgdata.lens.makernotes.MinAp4CurFocal = powf64(2.0f, (int_to_float(data)/2.0f));
++      	imgdata.lens.makernotes.MinAp4CurFocal = libraw_powf64(2.0f, (int_to_float(data)/2.0f));
+       } else {
+-        imgdata.lens.makernotes.MinAp4CurFocal = powf64(2.0f, (getreal(type) / 2.0f));
++        imgdata.lens.makernotes.MinAp4CurFocal = libraw_powf64(2.0f, (getreal(type) / 2.0f));
+       }
+       break;
+     case 0x0416:
+@@ -14127,15 +14127,15 @@ void CLASS identify()
+       case 18: iso_speed = 320; break;
+       case 19: iso_speed = 400; break;
+     }
+-    shutter = powf64(2.0f, (((float)get4())/8.0f)) / 16000.0f;
++    shutter = libraw_powf64(2.0f, (((float)get4())/8.0f)) / 16000.0f;
+     FORC4 cam_mul[c ^ (c >> 1)] = get4();
+     fseek (ifp, 88, SEEK_SET);
+-    aperture = powf64(2.0f, ((float)get4())/16.0f);
++    aperture = libraw_powf64(2.0f, ((float)get4())/16.0f);
+     fseek (ifp, 112, SEEK_SET);
+     focal_len = get4();
+ #ifdef LIBRAW_LIBRARY_BUILD
+     fseek (ifp, 104, SEEK_SET);
+-    imgdata.lens.makernotes.MaxAp4CurFocal = powf64(2.0f, ((float)get4())/16.0f);
++    imgdata.lens.makernotes.MaxAp4CurFocal = libraw_powf64(2.0f, ((float)get4())/16.0f);
+     fseek (ifp, 124, SEEK_SET);
+     stmread(imgdata.lens.makernotes.Lens, 32, ifp);
+     imgdata.lens.makernotes.CameraMount = LIBRAW_MOUNT_Contax_N;
diff -Nru digikam-5.7.0/debian/patches/reduce-exiv-dependency.patch digikam-5.7.0/debian/patches/reduce-exiv-dependency.patch
--- digikam-5.7.0/debian/patches/reduce-exiv-dependency.patch	1970-01-01 00:00:00.000000000 +0000
+++ digikam-5.7.0/debian/patches/reduce-exiv-dependency.patch	2018-04-11 21:03:20.000000000 +0000
@@ -0,0 +1,15 @@
+Description:  Reduce dependency versioning on exiv2 from 0.26 to 0.25 in core/CMakelists.txt
+Author: Peter Michael Green <plugwash@raspbian.org>
+Last-Update: 2018-04-11
+
+--- digikam-5.7.0.orig/core/CMakeLists.txt
++++ digikam-5.7.0/core/CMakeLists.txt
+@@ -58,7 +58,7 @@ set(QT_MIN_VERSION       "5.6.0")
+ set(KIPI_MIN_VERSION     "5.0.0")
+ set(KSANE_MIN_VERSION    "5.0.0")
+ set(LENSFUN_MIN_VERSION  "0.2.6.0")
+-set(EXIV2_MIN_VERSION    "0.26")
++set(EXIV2_MIN_VERSION    "0.25")
+ set(AKONADI_MIN_VERSION  "4.89.0")        # Akonadi Contact dependency
+ set(CALENDAR_MIN_VERSION "4.81.0")        # Calendar Core dependency
+ set(QTAV_MIN_VERSION     "1.12.0")
diff -Nru digikam-5.7.0/debian/patches/series digikam-5.7.0/debian/patches/series
--- digikam-5.7.0/debian/patches/series	2017-10-02 00:55:44.000000000 +0000
+++ digikam-5.7.0/debian/patches/series	2018-04-11 21:03:20.000000000 +0000
@@ -1,2 +1,5 @@
 cmake-disable-jasper.patch
 cmake-add-quotes
+reduce-exiv-dependency.patch
+kcalcore-fixes.patch
+libraw_powf64.patch
diff -Nru digikam-5.7.0/debian/rules digikam-5.7.0/debian/rules
--- digikam-5.7.0/debian/rules	2017-08-29 02:40:26.000000000 +0000
+++ digikam-5.7.0/debian/rules	2018-04-11 21:03:20.000000000 +0000
@@ -16,6 +16,7 @@
 
 override_dh_clean:
 	rm -f core/data/about/js/bootstrap.min.js core/data/about/js/jquery.min.js
+	rm -f extra/libkface
 	dh_clean
 
 override_dh_auto_configure: