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diff --git a/nsxiv/.github/workflows/build.yml b/nsxiv/.github/workflows/build.yml
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+name: Build
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+# NOTE: "stable" tcc is too old and fails at linking. instead fetching a recent known working commit.
+jobs:
+  full-build:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - name: dep
+      run: |
+        sudo apt-get update
+        sudo apt-get install libimlib2 libimlib2-dev xserver-xorg-core xserver-xorg-dev \
+                             libxft2 libxft-dev libexif12 libexif-dev \
+                             gcc clang git
+        TCC_SHA="027b8fb9b88fe137447fb8bb1b61079be9702472"
+        wget "https://github.com/TinyCC/tinycc/archive/${TCC_SHA}.tar.gz" && tar xzf "${TCC_SHA}.tar.gz"
+        ( cd "tinycc-$TCC_SHA" && ./configure && make && sudo make install; )
+    - name: build
+      run: |
+        # vanilla flags
+        CFLAGS="-std=c99 -Wall -pedantic"
+        # extra flags
+        CFLAGS+=" -O3 -flto"
+        CFLAGS+=" -Werror -Wextra -Wshadow -Wvla -Wpointer-arith"
+        CFLAGS+=" -Wundef -Wstrict-overflow=4 -Wwrite-strings -Wunreachable-code"
+        CFLAGS+=" -Wbad-function-cast -Wdeclaration-after-statement"
+        CFLAGS+=" -Wmissing-prototypes -Wstrict-prototypes"
+        # silence
+        CFLAGS+=" -Wno-sign-compare -Wno-unused-parameter -Wno-missing-field-initializers"
+        echo "###  GCC BUILD  ###" && make clean && make -s CC=gcc   CFLAGS="$CFLAGS" LDFLAGS="$CFLAGS" OPT_DEP_DEFAULT=1
+        echo "### CLANG BUILD ###" && make clean && make -s CC=clang CFLAGS="$CFLAGS" LDFLAGS="$CFLAGS" OPT_DEP_DEFAULT=1
+        echo "###  TCC BUILD  ###" && make clean && make -s CC=tcc   CFLAGS="$CFLAGS" LDFLAGS="$CFLAGS" OPT_DEP_DEFAULT=1
+
+  minimal-build:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - name: dep
+      run: |
+        sudo apt-get update
+        sudo apt-get install libimlib2 libimlib2-dev xserver-xorg-core xserver-xorg-dev \
+                             gcc clang git
+        sudo apt-get remove libxft2 libxft-dev libexif12 libexif-dev
+        TCC_SHA="027b8fb9b88fe137447fb8bb1b61079be9702472"
+        wget "https://github.com/TinyCC/tinycc/archive/${TCC_SHA}.tar.gz" && tar xzf "${TCC_SHA}.tar.gz"
+        ( cd "tinycc-$TCC_SHA" && ./configure && make && sudo make install; )
+    - name: build
+      run: |
+        # vanilla flags
+        CFLAGS="-std=c99 -Wall -pedantic"
+        # extra flags
+        CFLAGS+=" -O3 -flto"
+        CFLAGS+=" -Werror -Wextra -Wshadow -Wvla -Wpointer-arith"
+        CFLAGS+=" -Wundef -Wstrict-overflow=4 -Wwrite-strings -Wunreachable-code"
+        CFLAGS+=" -Wbad-function-cast -Wdeclaration-after-statement"
+        CFLAGS+=" -Wmissing-prototypes -Wstrict-prototypes"
+        # silence
+        CFLAGS+=" -Wno-sign-compare -Wno-unused-parameter -Wno-missing-field-initializers"
+        echo "###  GCC BUILD  ###" && make clean && make -s CC=gcc   CFLAGS="$CFLAGS" LDFLAGS="$CFLAGS" OPT_DEP_DEFAULT=0
+        echo "### CLANG BUILD ###" && make clean && make -s CC=clang CFLAGS="$CFLAGS" LDFLAGS="$CFLAGS" OPT_DEP_DEFAULT=0
+        echo "###  TCC BUILD  ###" && make clean && make -s CC=tcc   CFLAGS="$CFLAGS" LDFLAGS="$CFLAGS" OPT_DEP_DEFAULT=0