[gdal-dev] Build GDAL on iOS for iPhone

[Gane R]

Hi all,

I had a change to see the link
http://stackoverflow.com/questions/12643898/incorporating-gdal-ogr-into-an-ios-project-a-quick-guide

This was guiding to build with Xcode 4.0, the above link says that it
doesn't work with Xcode version above 4.0

I just wanted to build GDAL as static library for iPhone and use the OGR
library there in iPhone.

I modified the build script as shown here, build_gdal_ios_cus.sh

#!/bin/bash
if [ "$#" -eq 0 ]
then
    echo "No parameters supplied"
else
    default_prefix="${HOME}/Documents/iOS_GDAL"
    prefix="${default_prefix}"
    if [ "$1" == "arm" ]
    then
        arch="armv7"
    fi
    if [ "$1" == "sim" ]
    then
        arch="i386"
    fi
    if [ "$2" == "iPhone" ]
    then
        export PATH=$PATH:/Users/w1/ctools
        echo $PATH
        #extra_cflags="-m${thumb_opt:-no-thumb} -mthumb-interwork"
        platform="iPhone"

platform_dir="/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain"
        platform_bin_dir="${platform_dir}/usr/bin"

platform_sdk_dir="/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/"
        prefix="${prefix}/${arch}/${platform}.platform/iPhoneOS.sdk"
        echo library will be exported to $prefix
        #export CC="${platform_bin_dir}/clang"
        export
INCDIR="/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/usr/include"
        export
INCDIR1="/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/usr/include/c++/4.2.1/tr1"
        export
INCDIRCPP="/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/usr/include/c++/4.2.1"
        #export CFLAGS="-std=gnu99 -nostdinc -I${INCDIR} -I${INCDIRCPP}
-I${INCDIR1} -arch ${arch} -pipe -Os -gdwarf-2 -isysroot
${platform_sdk_dir}"
        export CFLAGS="-std=gnu99 -nostdinc -I${INCDIR} -I${INCDIR1} -arch
${arch} -pipe -Os -gdwarf-2 -isysroot ${platform_sdk_dir}"
        export LDFLAGS="-arch ${arch} -isysroot ${platform_sdk_dir}"
        export CXXFLAGS="-stdlib=libstdc++ -nostdinc++ -I${INCDIR}
-I${INCDIRCPP} -arch ${arch} -pipe -Os -gdwarf-2 -isysroot
${platform_sdk_dir}"
    fi
    if [ "$1" == "sim" ]
    then
        platform="iPhoneSimulator"
    fi
    ./configure \
        --prefix="${prefix}" \
        --host="${arch}-apple-darwin" \
        --disable-shared \
        --enable-static \
        --with-unix-stdio-64=no
fi


I created symbolic links to
 armv7-apple-darwin-gcc -> /usr/bin/llvm-gcc
 armv7-apple-darwin-g++ -> /usr/bin/llvm-g++

Actually points
 llvm-g++ -> clang++
 llvm-gcc -> clang

Above script was invoked as
./build_gdal_ios_cus.sh arm iPhone

Configure succeeded.

when I run

make
I get error like this

(cd alg; /Applications/Xcode.app/Contents/Developer/usr/bin/make)
/bin/sh /Users/w1/gdal-2.1.0/libtool --mode=compile --tag=CC
armv7-apple-darwin-gcc -I/Users/w1/gdal-2.1.0/port
-I/Users/w1/gdal-2.1.0/gcore -I/Users/w1/gdal-2.1.0/alg
-I/Users/w1/gdal-2.1.0/ogr -I/Users/w1/gdal-2.1.0/ogr/ogrsf_frmts
-I/Users/w1/gdal-2.1.0/gnm -I/Users/w1/gdal-2.1.0/apps -std=gnu99 -nostdinc
-I/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/usr/include
-I/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/usr/include/c++/4.2.1/tr1
-arch armv7 -pipe -Os -gdwarf-2 -isysroot
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/
-Wall -Wdeclaration-after-statement -Wextra -Winit-self -Wunused-parameter
-Wmissing-prototypes -Wmissing-declarations -Wformat
-Werror=format-security -Wno-format-nonliteral -Wshorten-64-to-32 -Wshadow
-Werror=vla -Wdeclaration-after-statement -Wnull-dereference
-DINTERNAL_QHULL -Ilibqhull -DOGR_ENABLED -I/Users/w1/gdal-2.1.0/port
-DGDAL_COMPILATION  -c -o delaunay.lo delaunay.c
libtool: compile:  armv7-apple-darwin-gcc -I/Users/w1/gdal-2.1.0/port
-I/Users/w1/gdal-2.1.0/gcore -I/Users/w1/gdal-2.1.0/alg
-I/Users/w1/gdal-2.1.0/ogr -I/Users/w1/gdal-2.1.0/ogr/ogrsf_frmts
-I/Users/w1/gdal-2.1.0/gnm -I/Users/w1/gdal-2.1.0/apps -std=gnu99 -nostdinc
-I/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/usr/include
-I/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/usr/include/c++/4.2.1/tr1
-arch armv7 -pipe -Os -gdwarf-2 -isysroot
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/
-Wall -Wdeclaration-after-statement -Wextra -Winit-self -Wunused-parameter
-Wmissing-prototypes -Wmissing-declarations -Wformat
-Werror=format-security -Wno-format-nonliteral -Wshorten-64-to-32 -Wshadow
-Werror=vla -Wdeclaration-after-statement -Wnull-dereference
-DINTERNAL_QHULL -Ilibqhull -DOGR_ENABLED -I/Users/w1/gdal-2.1.0/port
-DGDAL_COMPILATION -c delaunay.c -o delaunay.o
In file included from delaunay.c:62:
In file included from /w1/gdal-2.1.0/alg/internal_qhull_headers.h:977:
libqhull/libqhull.c:64:34: error: use of undeclared identifier 'DBL_MAX'
  if (qh RERUN || qh JOGGLEmax < REALmax/2)
                                 ^
libqhull/user.h:145:17: note: expanded from macro 'REALmax'
#define REALmax DBL_MAX
                ^
In file included from delaunay.c:62:
In file included from /w1/gdal-2.1.0/alg/internal_qhull_headers.h:977:
libqhull/libqhull.c:301:37: error: use of undeclared identifier 'DBL_MAX'
    if (!qh RERUN && qh JOGGLEmax < REALmax/2) {
                                    ^
libqhull/user.h:145:17: note: expanded from macro 'REALmax'
#define REALmax DBL_MAX
                ^
In file included from delaunay.c:62:
In file included from /w1/gdal-2.1.0/alg/internal_qhull_headers.h:977:
libqhull/libqhull.c:325:49: error: use of undeclared identifier 'DBL_MAX'
      if (qh TRACEpoint != -1 || qh TRACEdist < REALmax/2 || qh TRACEmerge)
{
                                                ^
libqhull/

It seems that the float.h or cfloat does't have such definition or
implementation for arm target

Questions:

1. Can we build GDAL for iPhone with arm7 targert ??

2. Did I have missed or misconfigured something ???

Any suggestion or references on web will be of great help.

Thanks
Gane
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