Save some cpu time and disk by testing linking against static and shared
library in single environments.

The .ci/linux-build.sh is modified so it reconfigures an existing build
directory: an empty DEF_LIB= means that static and shared builds are
to be tested.

ABI checks, documentation generation and unit tests are disabled for
static builds as they would be redundant with the check against
dynamically linked binaries, if any.

Note:
- --cross-file is an option that can be passed to meson only when
  creating a build environment,
- for some other reason, --buildtype and other non -D options are only
  accepted when setting up a build directory with meson. When
  reconfiguring, only their -D$option forms are accepted,

Signed-off-by: David Marchand <david.march...@redhat.com>
---
 .ci/linux-build.sh          | 25 ++++++++++++++++++-------
 .github/workflows/build.yml | 28 ----------------------------
 2 files changed, 18 insertions(+), 35 deletions(-)

diff --git a/.ci/linux-build.sh b/.ci/linux-build.sh
index 14148fef4a..baec65a914 100755
--- a/.ci/linux-build.sh
+++ b/.ci/linux-build.sh
@@ -1,5 +1,11 @@
 #!/bin/sh -xe
 
+if [ -z "${DEF_LIB:-}" ]; then
+    DEF_LIB=static ABI_CHECKS= BUILD_DOCS= RUN_TESTS= $0
+    DEF_LIB=shared $0
+    exit
+fi
+
 # Builds are run as root in containers, no need for sudo
 [ "$(id -u)" != '0' ] || alias sudo=
 
@@ -78,10 +84,6 @@ if [ "$RISCV64" = "true" ]; then
     cross_file=config/riscv/riscv64_linux_gcc
 fi
 
-if [ -n "$cross_file" ]; then
-    OPTS="$OPTS --cross-file $cross_file"
-fi
-
 if [ "$BUILD_DOCS" = "true" ]; then
     OPTS="$OPTS -Denable_docs=true"
 fi
@@ -101,8 +103,8 @@ else
 fi
 
 OPTS="$OPTS -Dplatform=generic"
-OPTS="$OPTS --default-library=$DEF_LIB"
-OPTS="$OPTS --buildtype=debugoptimized"
+OPTS="$OPTS -Ddefault_library=$DEF_LIB"
+OPTS="$OPTS -Dbuildtype=debugoptimized"
 OPTS="$OPTS -Dcheck_includes=true"
 if [ "$MINI" = "true" ]; then
     OPTS="$OPTS -Denable_drivers=net/null"
@@ -118,7 +120,16 @@ if [ "$ASAN" = "true" ]; then
     fi
 fi
 
-meson build --werror $OPTS
+OPTS="$OPTS -Dwerror=true"
+
+if [ -d build ]; then
+    meson configure build $OPTS
+else
+    if [ -n "$cross_file" ]; then
+        OPTS="$OPTS --cross-file $cross_file"
+    fi
+    meson setup build $OPTS
+fi
 ninja -C build
 
 if [ -z "$cross_file" ]; then
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index b32758ff6f..82d83f4030 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -35,21 +35,12 @@ jobs:
         config:
           - os: ubuntu-20.04
             compiler: gcc
-            library: static
-          - os: ubuntu-20.04
-            compiler: gcc
-            library: shared
             mini: mini
           - os: ubuntu-20.04
             compiler: gcc
-            library: shared
             checks: doc+tests
           - os: ubuntu-20.04
             compiler: clang
-            library: static
-          - os: ubuntu-20.04
-            compiler: clang
-            library: shared
             checks: asan+doc+tests
           - os: ubuntu-20.04
             compiler: gcc
@@ -61,23 +52,12 @@ jobs:
             cross: mingw
           - os: ubuntu-20.04
             compiler: gcc
-            library: static
-            cross: aarch64
-          - os: ubuntu-20.04
-            compiler: gcc
-            library: shared
             cross: aarch64
           - os: ubuntu-20.04
             compiler: gcc
-            library: static
             cross: ppc64le
           - os: ubuntu-20.04
             compiler: gcc
-            library: shared
-            cross: ppc64le
-          - os: ubuntu-20.04
-            compiler: gcc
-            library: shared
             cross: riscv64
 
     steps:
@@ -218,16 +198,8 @@ jobs:
         config:
           - image: fedora:35
             compiler: gcc
-            library: static
-          - image: fedora:35
-            compiler: gcc
-            library: shared
-          - image: fedora:35
-            compiler: clang
-            library: static
           - image: fedora:35
             compiler: clang
-            library: shared
 
     steps:
     - name: Checkout sources
-- 
2.37.3

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