我正在尝试使用两种不同的方法为Android构建ffmpeg源：
这里的问题是，在两种方法中我都面临一个类似的问题，因此我想问题不在于那些脚本，而是我的环境中存在某些问题。这是两个构建脚本的输出：
对于方法1：
/home/hamed/dev/android-tools/android-sdk-linux/ndk-bundle/toolchains/x86-4.9/prebuilt/linux-x86_64/bin/i686-linux-android-gcc is unable to create an executable file.
C compiler test failed.
If you think configure made a mistake, make sure you are using the latest
version from Git. If the latest version fails, report the problem to the
ffmpeg-user@ffmpeg.org mailing list or IRC #ffmpeg on irc.freenode.net.
Include the log file "conflog.txt" produced by configure as this will help
solve the problem.
Makefile:2: ffbuild/config.mak: No such file or directory
Makefile:40: /tools/Makefile: No such file or directory
Makefile:41: /ffbuild/common.mak: No such file or directory
Makefile:90: /libavutil/Makefile: No such file or directory
Makefile:90: /ffbuild/library.mak: No such file or directory
Makefile:92: /fftools/Makefile: No such file or directory
Makefile:93: /doc/Makefile: No such file or directory
Makefile:94: /doc/examples/Makefile: No such file or directory
Makefile:159: /tests/Makefile: No such file or directory
make: *** No rule to make target '/tests/Makefile'. Stop.
Makefile:2: ffbuild/config.mak: No such file or directory
Makefile:40: /tools/Makefile: No such file or directory
Makefile:41: /ffbuild/common.mak: No such file or directory
Makefile:90: /libavutil/Makefile: No such file or directory
Makefile:90: /ffbuild/library.mak: No such file or directory
Makefile:92: /fftools/Makefile: No such file or directory
Makefile:93: /doc/Makefile: No such file or directory
Makefile:94: /doc/examples/Makefile: No such file or directory
Makefile:159: /tests/Makefile: No such file or directory
make: *** No rule to make target '/tests/Makefile'. Stop.
Makefile:2: ffbuild/config.mak: No such file or directory
Makefile:40: /tools/Makefile: No such file or directory
Makefile:41: /ffbuild/common.mak: No such file or directory
Makefile:90: /libavutil/Makefile: No such file or directory
Makefile:90: /ffbuild/library.mak: No such file or directory
Makefile:92: /fftools/Makefile: No such file or directory
Makefile:93: /doc/Makefile: No such file or directory
Makefile:94: /doc/examples/Makefile: No such file or directory
Makefile:159: /tests/Makefile: No such file or directory
make: *** No rule to make target '/tests/Makefile'. Stop.
Android X86 builds finished
对于方法2：
checking how to print strings... printf
checking for style of include used by make... GNU
checking for arm-linux-androideabi-gcc... /home/hamed/dev/android-tools/android-ndk-r18/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/arm-linux-androideabi-gcc
checking whether the C compiler works... no
configure: error: in `/home/hamed/dev/projects/ffmpeg/ffmpeg-binary-android/build_scripts/opus-1.1.5':
configure: error: C compiler cannot create executables
我什至尝试重新下载NDK，因为担心gcc编译器已损坏，但仍然出现相同的错误行。
这是第二种方法的config.log模块中的OPUS文件：
This file contains any messages produced by compilers while
running configure, to aid debugging if configure makes a mistake.
It was created by opus configure 1.1.5, which was
generated by GNU Autoconf 2.69. Invocation command line was
$ ./configure -v --prefix=/home/hamed/dev/projects/ffmpeg/ffmpeg-binary-android/build_scripts/build_dir --host=arm-linux-androideabi --enable-static --disable-shared --disable-doc --disable-extra-programs
## --------- ##
## Platform. ##
## --------- ##
hostname = putech-laptop
uname -m = x86_64
uname -r = 4.15.0-36-generic
uname -s = Linux
uname -v = #39-Ubuntu SMP Mon Sep 24 16:19:09 UTC 2018
/usr/bin/uname -p = unknown
/bin/uname -X = unknown
/bin/arch = unknown
/usr/bin/arch -k = unknown
/usr/convex/getsysinfo = unknown
/usr/bin/hostinfo = unknown
/bin/machine = unknown
/usr/bin/oslevel = unknown
/bin/universe = unknown
PATH: /home/hamed/.local/bin
PATH: /home/hamed/.local/bin
PATH: /usr/local/sbin
PATH: /usr/local/bin
PATH: /usr/sbin
PATH: /usr/bin
PATH: /sbin
PATH: /bin
PATH: /usr/games
PATH: /usr/local/games
PATH: /snap/bin
PATH: /home/hamed/dev/go/bin
PATH: /home/hamed/dev/android-tools/android-sdk-linux/platform-tools/
PATH: /home/hamed/dev/go/bin
PATH: /home/hamed/dev/android-tools/android-sdk-linux/platform-tools/
PATH: /home/hamed/dev/projects/ffmpeg/ffmpeg-binary-android/build_scripts/build_dir/bin/
## ----------- ##
## Core tests. ##
## ----------- ##
configure:2354: checking whether make supports nested variables
configure:2371: result: yes
configure:2437: checking for a BSD-compatible install
configure:2505: result: /usr/bin/install -c
configure:2516: checking whether build environment is sane
configure:2571: result: yes
configure:2630: checking for arm-linux-androideabi-strip
configure:2657: result: /home/hamed/dev/android-tools/android-ndk-r18/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/arm-linux-androideabi-strip
configure:2722: checking for a thread-safe mkdir -p
configure:2761: result: /bin/mkdir -p
configure:2768: checking for gawk
configure:2798: result: no
configure:2768: checking for mawk
configure:2784: found /usr/bin/mawk
configure:2795: result: mawk
configure:2806: checking whether make sets $(MAKE)
configure:2828: result: yes
configure:2953: checking whether to enable maintainer-specific portions of Makefiles
configure:2962: result: yes
configure:2980: checking build system type
configure:2994: result: x86_64-unknown-linux-gnu
configure:3014: checking host system type
configure:3027: result: arm-unknown-linux-androideabi
configure:3099: checking how to print strings
configure:3126: result: printf
configure:3159: checking for style of include used by make
configure:3187: result: GNU
configure:3218: checking for arm-linux-androideabi-gcc
configure:3245: result: /home/hamed/dev/android-tools/android-ndk-r18/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/arm-linux-androideabi-gcc
configure:3514: checking for C compiler version
configure:3523: /home/hamed/dev/android-tools/android-ndk-r18/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/arm-linux-androideabi-gcc --version >&5
Android (4751641 based on r328903) clang version 7.0.2 (https://android.googlesource.com/toolchain/clang 003100370607242ddd5815e4a043907ea9004281) (https://android.googlesource.com/toolchain/llvm 1d739ffb0366421d383e04ff80ec2ee591315116) (based on LLVM 7.0.2svn)
Target: arm--linux-android
Thread model: posix
InstalledDir: /home/hamed/dev/android-tools/android-ndk-r18/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/../../../../llvm/prebuilt/linux-x86_64/bin
configure:3534: $? = 0
configure:3523: /home/hamed/dev/android-tools/android-ndk-r18/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/arm-linux-androideabi-gcc -v >&5
Android (4751641 based on r328903) clang version 7.0.2 (https://android.googlesource.com/toolchain/clang 003100370607242ddd5815e4a043907ea9004281) (https://android.googlesource.com/toolchain/llvm 1d739ffb0366421d383e04ff80ec2ee591315116) (based on LLVM 7.0.2svn)
Target: arm--linux-android
Thread model: posix
InstalledDir: /home/hamed/dev/android-tools/android-ndk-r18/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/../../../../llvm/prebuilt/linux-x86_64/bin
configure:3534: $? = 0
configure:3523: /home/hamed/dev/android-tools/android-ndk-r18/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/arm-linux-androideabi-gcc -V >&5
clang: error: argument to '-V' is missing (expected 1 value)
clang: error: no input files
configure:3534: $? = 1
configure:3523: /home/hamed/dev/android-tools/android-ndk-r18/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/arm-linux-androideabi-gcc -qversion >&5
clang: error: unknown argument '-qversion', did you mean '--version'?
clang: error: no input files
configure:3534: $? = 1
configure:3554: checking whether the C compiler works
configure:3576: /home/hamed/dev/android-tools/android-ndk-r18/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/arm-linux-androideabi-gcc -mfloat-abi=softfp -marm -march=armv7-a -Os -O3 -I/home/hamed/dev/projects/ffmpeg/ffmpeg-binary-android/build_scripts/build_dir/include --sysroot=/home/hamed/dev/android-tools/android-ndk-r18/platforms/android-16/arch-arm/ -fPIE --sysroot=/home/hamed/dev/android-tools/android-ndk-r18/platforms/android-16/arch-arm/ -L/home/hamed/dev/projects/ffmpeg/ffmpeg-binary-android/build_scripts/build_dir/lib -fPIE -pie conftest.c >&5
/usr/bin/ld: unrecognised emulation mode: armelf_linux_eabi
Supported emulations: elf_x86_64 elf32_x86_64 elf_i386 elf_iamcu i386linux elf_l1om elf_k1om i386pep i386pe
clang: error: linker command failed with exit code 1 (use -v to see invocation)
configure:3580: $? = 1
configure:3618: result: no
configure: failed program was:
| /* confdefs.h */
| #define PACKAGE_NAME "opus"
| #define PACKAGE_TARNAME "opus"
| #define PACKAGE_VERSION "1.1.5"
| #define PACKAGE_STRING "opus 1.1.5"
| #define PACKAGE_BUGREPORT "opus@xiph.org"
| #define PACKAGE_URL ""
| /* end confdefs.h. */
|
| int
| main ()
| {
|
| ;
| return 0;
| }
configure:3623: error: in `/home/hamed/dev/projects/ffmpeg/ffmpeg-binary-android/build_scripts/opus-1.1.5':
configure:3625: error: C compiler cannot create executables
See `config.log' for more details
## ---------------- ##
## Cache variables. ##
## ---------------- ##
ac_cv_build=x86_64-unknown-linux-gnu
ac_cv_env_ARM_NEON_INTR_CFLAGS_set=
ac_cv_env_ARM_NEON_INTR_CFLAGS_value=
ac_cv_env_CCASFLAGS_set=
ac_cv_env_CCASFLAGS_value=
ac_cv_env_CCAS_set=
ac_cv_env_CCAS_value=
ac_cv_env_CC_set=set
ac_cv_env_CC_value=/home/hamed/dev/android-tools/android-ndk-r18/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/arm-linux-androideabi-gcc
ac_cv_env_CFLAGS_set=set
ac_cv_env_CFLAGS_value='-mfloat-abi=softfp -marm -march=armv7-a -Os -O3 -I/home/hamed/dev/projects/ffmpeg/ffmpeg-binary-android/build_scripts/build_dir/include --sysroot=/home/hamed/dev/android-tools/android-ndk-r18/platforms/android-16/arch-arm/ -fPIE '
ac_cv_env_CPPFLAGS_set=set
ac_cv_env_CPPFLAGS_value='--sysroot=/home/hamed/dev/android-tools/android-ndk-r18/platforms/android-16/arch-arm/ '
ac_cv_env_CPP_set=set
ac_cv_env_CPP_value=/home/hamed/dev/android-tools/android-ndk-r18/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/arm-linux-androideabi-cpp
ac_cv_env_LDFLAGS_set=set
ac_cv_env_LDFLAGS_value='-L/home/hamed/dev/projects/ffmpeg/ffmpeg-binary-android/build_scripts/build_dir/lib -fPIE -pie '
ac_cv_env_LIBS_set=
ac_cv_env_LIBS_value=
ac_cv_env_LT_SYS_LIBRARY_PATH_set=
ac_cv_env_LT_SYS_LIBRARY_PATH_value=
ac_cv_env_X86_AVX_CFLAGS_set=
ac_cv_env_X86_AVX_CFLAGS_value=
ac_cv_env_X86_SSE2_CFLAGS_set=
ac_cv_env_X86_SSE2_CFLAGS_value=
ac_cv_env_X86_SSE4_1_CFLAGS_set=
ac_cv_env_X86_SSE4_1_CFLAGS_value=
ac_cv_env_X86_SSE_CFLAGS_set=
ac_cv_env_X86_SSE_CFLAGS_value=
ac_cv_env_build_alias_set=
ac_cv_env_build_alias_value=
ac_cv_env_host_alias_set=set
ac_cv_env_host_alias_value=arm-linux-androideabi
ac_cv_env_target_alias_set=
ac_cv_env_target_alias_value=
ac_cv_host=arm-unknown-linux-androideabi
ac_cv_path_install='/usr/bin/install -c'
ac_cv_path_mkdir=/bin/mkdir
ac_cv_prog_AWK=mawk
ac_cv_prog_CC=/home/hamed/dev/android-tools/android-ndk-r18/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/arm-linux-androideabi-gcc
ac_cv_prog_STRIP=/home/hamed/dev/android-tools/android-ndk-r18/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/arm-linux-androideabi-strip
ac_cv_prog_make_make_set=yes
am_cv_make_support_nested_variables=yes
## ----------------- ##
## Output variables. ##
## ----------------- ##
ACLOCAL='${SHELL} /home/hamed/dev/projects/ffmpeg/ffmpeg-binary-android/build_scripts/opus-1.1.5/missing aclocal-1.15'
AMDEPBACKSLASH='\'
AMDEP_FALSE='#'
AMDEP_TRUE=''
AMTAR='$${TAR-tar}'
AM_BACKSLASH='\'
AM_DEFAULT_V='$(AM_DEFAULT_VERBOSITY)'
AM_DEFAULT_VERBOSITY='0'
AM_V='$(V)'
AR='/home/hamed/dev/android-tools/android-ndk-r18/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/arm-linux-androideabi-ar'
ARM2GNU_PARAMS=''
ARM_NEON_INTR_CFLAGS=''
AUTOCONF='${SHELL} /home/hamed/dev/projects/ffmpeg/ffmpeg-binary-android/build_scripts/opus-1.1.5/missing autoconf'
AUTOHEADER='${SHELL} /home/hamed/dev/projects/ffmpeg/ffmpeg-binary-android/build_scripts/opus-1.1.5/missing autoheader'
AUTOMAKE='${SHELL} /home/hamed/dev/projects/ffmpeg/ffmpeg-binary-android/build_scripts/opus-1.1.5/missing automake-1.15'
AWK='mawk'
CC='/home/hamed/dev/android-tools/android-ndk-r18/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/arm-linux-androideabi-gcc'
CCAS=''
CCASDEPMODE=''
CCASFLAGS=''
CCDEPMODE=''
CFLAGS='-mfloat-abi=softfp -marm -march=armv7-a -Os -O3 -I/home/hamed/dev/projects/ffmpeg/ffmpeg-binary-android/build_scripts/build_dir/include --sysroot=/home/hamed/dev/android-tools/android-ndk-r18/platforms/android-16/arch-arm/ -fPIE '
CPP='/home/hamed/dev/android-tools/android-ndk-r18/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/arm-linux-androideabi-cpp'
CPPFLAGS='--sysroot=/home/hamed/dev/android-tools/android-ndk-r18/platforms/android-16/arch-arm/ '
CPU_ARM_FALSE=''
CPU_ARM_TRUE=''
CUSTOM_MODES_FALSE=''
CUSTOM_MODES_TRUE=''
CYGPATH_W='echo'
DEFS=''
DEPDIR='.deps'
DISABLE_FLOAT_API_FALSE=''
DISABLE_FLOAT_API_TRUE=''
DLLTOOL=''
DSYMUTIL=''
DUMPBIN=''
ECHO_C=''
ECHO_N='-n'
ECHO_T=''
EGREP=''
EXEEXT=''
EXTRA_PROGRAMS_FALSE=''
EXTRA_PROGRAMS_TRUE=''
FGREP=''
FIXED_POINT_FALSE=''
FIXED_POINT_TRUE=''
GREP=''
HAVE_ARM_NE10=''
HAVE_ARM_NE10_FALSE=''
HAVE_ARM_NE10_TRUE=''
HAVE_ARM_NEON_INTR_FALSE=''
HAVE_ARM_NEON_INTR_TRUE=''
HAVE_AVX_FALSE=''
HAVE_AVX_TRUE=''
HAVE_DOXYGEN=''
HAVE_DOXYGEN_FALSE=''
HAVE_DOXYGEN_TRUE=''
HAVE_PERL=''
HAVE_SSE2_FALSE=''
HAVE_SSE2_TRUE=''
HAVE_SSE4_1_FALSE=''
HAVE_SSE4_1_TRUE=''
HAVE_SSE_FALSE=''
HAVE_SSE_TRUE=''
INSTALL_DATA='${INSTALL} -m 644'
INSTALL_PROGRAM='${INSTALL}'
INSTALL_SCRIPT='${INSTALL}'
INSTALL_STRIP_PROGRAM='$(install_sh) -c -s'
LD='/home/hamed/dev/android-tools/android-ndk-r18/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/arm-linux-androideabi-ld'
LDFLAGS='-L/home/hamed/dev/projects/ffmpeg/ffmpeg-binary-android/build_scripts/build_dir/lib -fPIE -pie '
LIBM=''
LIBOBJS=''
LIBS=''
LIBTOOL=''
LIPO=''
LN_S=''
LTLIBOBJS=''
LT_SYS_LIBRARY_PATH=''
MAINT=''
MAINTAINER_MODE_FALSE='#'
MAINTAINER_MODE_TRUE=''
MAKEINFO='${SHELL} /home/hamed/dev/projects/ffmpeg/ffmpeg-binary-android/build_scripts/opus-1.1.5/missing makeinfo'
MANIFEST_TOOL=''
MKDIR_P='/bin/mkdir -p'
NE10_CFLAGS=''
NE10_LIBS=''
NM='/home/hamed/dev/android-tools/android-ndk-r18/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/arm-linux-androideabi-nm'
NMEDIT=''
OBJDUMP=''
OBJEXT=''
OPUS_ARM_EXTERNAL_ASM_FALSE=''
OPUS_ARM_EXTERNAL_ASM_TRUE=''
OPUS_ARM_INLINE_ASM_FALSE=''
OPUS_ARM_INLINE_ASM_TRUE=''
OPUS_ARM_MAY_HAVE_EDSP=''
OPUS_ARM_MAY_HAVE_MEDIA=''
OPUS_ARM_MAY_HAVE_NEON=''
OPUS_ARM_NEON_INTR_CFLAGS=''
OPUS_HAVE_RTCD=''
OPUS_LT_AGE='5'
OPUS_LT_CURRENT='5'
OPUS_LT_REVISION='5'
OPUS_X86_AVX_CFLAGS=''
OPUS_X86_SSE2_CFLAGS=''
OPUS_X86_SSE4_1_CFLAGS=''
OPUS_X86_SSE_CFLAGS=''
OTOOL64=''
OTOOL=''
PACKAGE='opus'
PACKAGE_BUGREPORT='opus@xiph.org'
PACKAGE_NAME='opus'
PACKAGE_STRING='opus 1.1.5'
PACKAGE_TARNAME='opus'
PACKAGE_URL=''
PACKAGE_VERSION='1.1.5'
PATH_SEPARATOR=':'
PC_BUILD=''
RANLIB='/home/hamed/dev/android-tools/android-ndk-r18/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/arm-linux-androideabi-ranlib'
SED=''
SET_MAKE=''
SHELL='/bin/bash'
STRIP='/home/hamed/dev/android-tools/android-ndk-r18/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/arm-linux-androideabi-strip'
VERSION='1.1.5'
X86_AVX_CFLAGS=''
X86_SSE2_CFLAGS=''
X86_SSE4_1_CFLAGS=''
X86_SSE_CFLAGS=''
ac_ct_AR=''
ac_ct_CC=''
ac_ct_DUMPBIN=''
am__EXEEXT_FALSE=''
am__EXEEXT_TRUE=''
am__fastdepCCAS_FALSE=''
am__fastdepCCAS_TRUE=''
am__fastdepCC_FALSE=''
am__fastdepCC_TRUE=''
am__include='include'
am__isrc=''
am__leading_dot='.'
am__nodep='_no'
am__quote=''
am__tar='$${TAR-tar} chof - "$$tardir"'
am__untar='$${TAR-tar} xf -'
bindir='${exec_prefix}/bin'
build='x86_64-unknown-linux-gnu'
build_alias=''
build_cpu='x86_64'
build_os='linux-gnu'
build_vendor='unknown'
datadir='${datarootdir}'
datarootdir='${prefix}/share'
docdir='${datarootdir}/doc/${PACKAGE_TARNAME}'
dvidir='${docdir}'
exec_prefix='NONE'
host='arm-unknown-linux-androideabi'
host_alias='arm-linux-androideabi'
host_cpu='arm'
host_os='linux-androideabi'
host_vendor='unknown'
htmldir='${docdir}'
includedir='${prefix}/include'
infodir='${datarootdir}/info'
install_sh='${SHELL} /home/hamed/dev/projects/ffmpeg/ffmpeg-binary-android/build_scripts/opus-1.1.5/install-sh'
libdir='${exec_prefix}/lib'
libexecdir='${exec_prefix}/libexec'
localedir='${datarootdir}/locale'
localstatedir='${prefix}/var'
mandir='${datarootdir}/man'
mkdir_p='$(MKDIR_P)'
oldincludedir='/usr/include'
pdfdir='${docdir}'
prefix='/home/hamed/dev/projects/ffmpeg/ffmpeg-binary-android/build_scripts/build_dir'
program_transform_name='s,x,x,'
psdir='${docdir}'
sbindir='${exec_prefix}/sbin'
sharedstatedir='${prefix}/com'
sysconfdir='${prefix}/etc'
target_alias=''
## ----------- ##
## confdefs.h. ##
## ----------- ##
/* confdefs.h */
#define PACKAGE_NAME "opus"
#define PACKAGE_TARNAME "opus"
#define PACKAGE_VERSION "1.1.5"
#define PACKAGE_STRING "opus 1.1.5"
#define PACKAGE_BUGREPORT "opus@xiph.org"
#define PACKAGE_URL ""
configure: exit 77
答案 0 :(得分：3)
从日志中可以看到，NDK r18中的gcc二进制文件不是GCC；他们是C。 NCC几年来一直不支持GCC，最终在NDK r18中将其删除。为了在使用Clang很好地构建项目但只是没有更新其构建脚本的情况下保持某种兼容性，我们保留了一些名为gcc的脚本，这些脚本只是使用正确的参数集来调用Clang。
configure:3576: /home/hamed/dev/android-tools/android-ndk-r18/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/arm-linux-androideabi-gcc -mfloat-abi=softfp -marm -march=armv7-a -Os -O3 -I/home/hamed/dev/projects/ffmpeg/ffmpeg-binary-android/build_scripts/build_dir/include --sysroot=/home/hamed/dev/android-tools/android-ndk-r18/platforms/android-16/arch-arm/ -fPIE --sysroot=/home/hamed/dev/android-tools/android-ndk-r18/platforms/android-16/arch-arm/ -L/home/hamed/dev/projects/ffmpeg/ffmpeg-binary-android/build_scripts/build_dir/lib -fPIE -pie conftest.c >&5
/usr/bin/ld: unrecognised emulation mode: armelf_linux_eabi
Supported emulations: elf_x86_64 elf32_x86_64 elf_i386 elf_iamcu i386linux elf_l1om elf_k1om i386pep i386pe
clang: error: linker command failed with exit code 1 (use -v to see invocation)
这里的错误是那些包装器脚本没有像需要的那样包含-gcc-toolchain。我刚刚提交了https://github.com/android-ndk/ndk/issues/805进行跟踪。
但是，即使已修复此问题，该项目仍无法构建：
configure:3523: /home/hamed/dev/android-tools/android-ndk-r18/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/arm-linux-androideabi-gcc -V >&5
clang: error: argument to '-V' is missing (expected 1 value)
clang: error: no input files
configure:3534: $? = 1
configure:3523: /home/hamed/dev/android-tools/android-ndk-r18/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/arm-linux-androideabi-gcc -qversion >&5
clang: error: unknown argument '-qversion', did you mean '--version'?
clang: error: no input files
我不确定这是您使用的生成脚本引起的还是ffmpeg使用的autoconf系统，但是如果要与NDK r18一起使用，则需要修复此处的某些内容。最好的选择可能是使用standalone toolchain。
否则，您将需要修复项目以使用Clang进行构建，或者恢复为较早的NDK。