additional changes to incoporate:

Switch to cross-compilation for linux_aarch64 and linux_ppc64le conda-forge#12
=> to work around Travis CI linux-ppc64le job failing (conda-forge/status#185)

Migrate to {{ stdlib("c") }} conda-forge#13
=> use cos7 for all linux platforms (in os_version: of conda-forge.yml)

.ci_support/linux_aarch64_.yaml

@@ -23,7 +23,7 @@ cxx_compiler:
 cxx_compiler_version:
 - '12'
 docker_image:
-- quay.io/condaforge/linux-anvil-aarch64
+- quay.io/condaforge/linux-anvil-cos7-x86_64
 target_platform:
 - linux-aarch64
 zip_keys:

.ci_support/linux_ppc64le_.yaml

@@ -17,7 +17,7 @@ cxx_compiler:
 cxx_compiler_version:
 - '12'
 docker_image:
-- quay.io/condaforge/linux-anvil-ppc64le
+- quay.io/condaforge/linux-anvil-cos7-x86_64
 target_platform:
 - linux-ppc64le
 zip_keys:

.ci_support/win_64_.yaml

@@ -2,6 +2,8 @@ c_compiler:
 - vs2019
 c_stdlib:
 - vs
+c_stdlib_version:
+- '2019'
 channel_sources:
 - conda-forge
 channel_targets:

conda-forge.yml

@@ -1,3 +1,6 @@
+build_platform:
+ linux_aarch64: linux_64
+ linux_ppc64le: linux_64
 conda_build:
  error_overlinking: false
 conda_forge_output_validation: true
@@ -7,3 +10,7 @@ github:
 provider:
  linux_aarch64: default
  linux_ppc64le: default
+os_version:
+ linux_64: cos7
+ linux_aarch64: cos7
+ linux_ppc64le: cos7