Opened 3 years ago

Closed 2 years ago

#6992 closed defect (invalid)

Cross-building ffmpeg with static gnutls for android fails at configure step

Reported by: alucryd Owned by:
Priority: normal Component: build system
Version: 3.4 Keywords:
Cc: Blocked By:
Blocking: Reproduced by developer: no
Analyzed by developer: no



I'm trying to cross-compile ffmpeg 3.4.1 for android using a freshly generated x86_64 android toolchain at API version 21.

Every external library was built static so the resulting ffmpeg binary links to the least possible number of libs.

Everything works fine except configure can't find gnutls with undefined references to a lot of GMP symbols despite -lgmp having been added to LIBS.

Here's my config.log:

Attachments (1)

config.log (366.3 KB) - added by alucryd 3 years ago.

Download all attachments as: .zip

Change History (8)

comment:1 Changed 3 years ago by alucryd

  • Summary changed from Cross-build ffmpeg with static gnutls on android fails at configure step to Cross-building ffmpeg with static gnutls for android fails at configure step

comment:2 Changed 3 years ago by cehoyos

Is the issue reproducible with current FFmpeg git head?
Please attach all necessary log files here in the ticket, do not use external resources (except for large media files).

How did you compile gmp?

Changed 3 years ago by alucryd


comment:3 Changed 3 years ago by alucryd

Reproduced with armv7 and aarch64, I've attached the config.log here this time.

Here is an overview of how I'm building gmp:

./configure --host=aarch64-linux-android --prefix=/srv/buildbot/aarch64_android/libgmp-aarch64_android/staging --disable-shared --enable-static


CFLAGS=-march=armv8-a -Os -pipe -fPIE -I/srv/buildbot/aarch64_android/staging/include
CPPFLAGS=-D_FORTIFY_SOURCE=2 -I/srv/buildbot/aarch64_android/staging/include
CXXFLAGS=-march=armv8-a -Os -pipe -fPIE -I/srv/buildbot/aarch64_android/staging/include
LDFLAGS=-Wl,-O1,--sort-common,--as-needed,-z,relro,-z,now -pie -static-libstdc++ -L/srv/buildbot/aarch64_android/staging/lib

FYI, I've been successfully cross-building a dynamically linked ffmpeg with the same gmp (albeit with --disable-static and --enable-shared) for linux platforms with all those architectures using toolchains from linaro or generated with crosstool-ng. The only thing that doesn't work when I'm going static is gnutls.

I'll try the git head as soon as I can.

comment:4 Changed 3 years ago by alucryd

I can reproduce using the current git head as well.

comment:5 Changed 3 years ago by alucryd

Hi guys, do you have any pointer that would help me diagnose the issue?

comment:6 Changed 2 years ago by alucryd

Turns out order matters, -lgmp needs to come after -lnettle and -lhogweed.

comment:7 Changed 2 years ago by alucryd

  • Resolution set to invalid
  • Status changed from new to closed
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