configure failed. Please help.

[udexon]

Here's my config.log starting from line 340. Any ideas?

configure:10521: checking C++ compiler aarch64-linux-android-g++  -O2 -g -pedantic -fomit-frame-pointer -Wa,--noexecstack -ffunction-sections -funwind-tables -no-canonical-prefixes -fno-strict-aliasing -fstack-protector-strong -finline-limit=300 -funswitch-loops
Test compile: 
configure:10535: aarch64-linux-android-g++  -O2 -g -pedantic -fomit-frame-pointer -Wa,--noexecstack -ffunction-sections -funwind-tables -no-canonical-prefixes -fno-strict-aliasing -fstack-protector-strong -finline-limit=300 -funswitch-loops conftest.cc >&5
clang80++: warning: optimization flag '-finline-limit=300' is not supported [-Wignored-optimization-argument]
clang80++: warning: optimization flag '-funswitch-loops' is not supported [-Wignored-optimization-argument]
/home/hongwu/devel/2020/Android/my-toolchain/bin/../lib/gcc/aarch64-linux-android/4.9.x/../../../../aarch64-linux-android/bin/ld: cannot find crtbegin_dynamic.o: No such file or directory
/home/hongwu/devel/2020/Android/my-toolchain/bin/../lib/gcc/aarch64-linux-android/4.9.x/../../../../aarch64-linux-android/bin/ld: cannot find -lc++
/home/hongwu/devel/2020/Android/my-toolchain/bin/../lib/gcc/aarch64-linux-android/4.9.x/../../../../aarch64-linux-android/bin/ld: cannot find crtend_android.o: No such file or directory
clang80++: error: linker command failed with exit code 1 (use -v to see invocation)
configure:10538: $? = 1
failed program was:

int main (void) { return 0; }
configure:10650: result: no
configure:10521: checking C++ compiler aarch64-linux-android-g++  -g -O2
Test compile: 
configure:10535: aarch64-linux-android-g++  -g -O2 conftest.cc >&5
/home/hongwu/devel/2020/Android/my-toolchain/bin/../lib/gcc/aarch64-linux-android/4.9.x/../../../../aarch64-linux-android/bin/ld: cannot find crtbegin_dynamic.o: No such file or directory
/home/hongwu/devel/2020/Android/my-toolchain/bin/../lib/gcc/aarch64-linux-android/4.9.x/../../../../aarch64-linux-android/bin/ld: cannot find -lc++
/home/hongwu/devel/2020/Android/my-toolchain/bin/../lib/gcc/aarch64-linux-android/4.9.x/../../../../aarch64-linux-android/bin/ld: cannot find crtend_android.o: No such file or directory
clang80++: error: linker command failed with exit code 1 (use -v to see invocation)
configure:10538: $? = 1
failed program was:

int main (void) { return 0; }
configure:10650: result: no
configure:10666: error: C++ compiler not available, see config.log for details

[Rupan]

Sorry its taken so long to respond. I suspect you're missing something in your development environment. I just rebuilt GMP 6.2.0 with NDK 21 and things worked fairly smoothly -- only a couple of changes to the build scripts were required.

[Rupan]

If you're not using Ubuntu then I suggest installing a VM with 19.10. Install the meta-package build-essential and download gmp-6.2.0 in /tmp (so the unpacked GMP path is /tmp/gmp-6.2.0). Now under the Android NDK under /tmp, enter /tmp/gmp-6.2.0 and run compile-gmp-arm.sh.