[taler-grid5k] 90/189: add doc

[gnunet]

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marco-boss pushed a commit to branch master
in repository grid5k.

commit f51756367e85349f1011bf7b65babbff9f03ad8e
Author: Boss Marco <bossm8@bfh.ch>
AuthorDate: Thu Mar 17 14:18:02 2022 +0100

    add doc
---
 docker/README.md |  4 ++++
 image/README.md  | 12 +++++++++++-
 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/docker/README.md b/docker/README.md
index 270db82..44af46d 100644
--- a/docker/README.md
+++ b/docker/README.md
@@ -87,6 +87,10 @@ docker-compose run --entrypoint /bin/bash taler-build
 **MERCHANT_COMMIT_SHA**: Which commit to use of taler-merchant 
 **WALLET_COMMIT_SHA**: Which commit to use of wallet-core 
 **GRID5K_COMMIT_SHA**: Which commit to use of this repo 
+**LIBMICROHTTPD_CFLAGS**: CFLAGS to pass to ./configure when building 
libmicrohttpd
+**GNUNET_CFLAGS**: CFLAGS to pass to ./configure when building gnunet
+**EXCHANGE_CFLAGS**: CFLAGS to pass to ./configure when building taler-exchange
+**MERCHANT_CFLAGS**: CFLAGS to pass to ./configure when building taler-merchant
 
 These are listed explicitely in the docker-compose.yml and not via 
environments.
 All of them default to master if they are not present in the compose or via 
environment.
diff --git a/image/README.md b/image/README.md
index cc52c66..e4f912e 100644
--- a/image/README.md
+++ b/image/README.md
@@ -19,15 +19,25 @@ kameleon build -g g5k_user:<G5K_USER> taler-debian11
 
 ### Additional Variables
 
+#### Source
+
 The Taler binaries are built from source. You have the possiblity to override 
the commit from 
 which should be built with the following variables (default `master`):
 
 `gnunet_commit_sha`, `exchange_commit_sha`, `merchant_commit_sha`, 
`wallet_commit_sha` and `grid5k_commit_sha`
 
+#### Build Flags
+
+For each package built from source there are CFLAG variables which can be 
passed to the image build:
+
+`libmicrohttpd_cflags`, `gnunet_cflags`, `exchange_cflags` and 
`merchant_cflags`
+
+#### Usage
+
 To override them you must add them to the `-g` option of `kameleon build`:
 
 ```bash
-kameleon build -g g5k_user:<G5K_USER> gnunet_commit_sha:master 
grid5k_commit_sha:node-setup taler-debian11
+kameleon build -g g5k_user:<G5K_USER> gnunet_commit_sha:master 
libmicrohttpd_cflags:"-O0 -g" taler-debian11
 ```
 
 For more information please run `kameleon build --help`

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