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Set CGO build flags and rust flags in builder environment #707

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d5c6e02
Set CGO build flags in builder environment
bbhtt Mar 7, 2026
0753033
Set RUSTFLAGS in builder environment
bbhtt Mar 8, 2026
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1 change: 1 addition & 0 deletions NEWS
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Original file line number Diff line number Diff line change
Expand Up @@ -8,6 +8,7 @@ TBD
* Prevent writing duplicate groups to metadata file
* Disable all filesystem access in flatpak-builder --run sandbox
* Add ability to set custom fusermount path
* Support setting CGO buildflags and RUSTFLAGS in builder environment

Changes in 1.4.6
================
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32 changes: 32 additions & 0 deletions data/flatpak-manifest.schema.json
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Expand Up @@ -22,10 +22,18 @@
"description": "This is set in the environment variable CFLAGS during the build. Multiple specifications of this (in e.g. per-arch area) are concatenated, separated by spaces.",
"type": "string"
},
"cgo-cflags": {
"description": "This is set in the environment variable CGO_CFLAGS during the build. Multiple specifications of this (in e.g. per-arch area) are concatenated, separated by spaces. If unset, defaults to the value of cflags.",
"type": "string"
},
"cflags-override": {
"description": "If this is true, clear cflags from previous build options before adding it from these options.",
"type": "boolean"
},
"cgo-cflags-override": {
"description": "If this is true, clear cgo-cflags from previous build options before adding it from these options. If set without cgo-cflags, CGO_CFLAGS will not be set.",
"type": "boolean"
},
"cppflags": {
"description": "This is set in the environment variable CPPFLAGS during the build. Multiple specifications of this (in e.g. per-arch area) are concatenated, separated by spaces.",
"type": "string"
Expand All @@ -38,18 +46,42 @@
"description": "This is set in the environment variable CXXFLAGS during the build. Multiple specifications of this (in e.g. per-arch area) are concatenated, separated by spaces.",
"type": "string"
},
"cgo-cxxflags": {
"description": "This is set in the environment variable CGO_CXXFLAGS during the build. Multiple specifications of this (in e.g. per-arch area) are concatenated, separated by spaces. If unset, defaults to the value of cxxflags.",
"type": "string"
},
"cxxflags-override": {
"description": "If this is true, clear cxxflags from previous build options before adding it from these options.",
"type": "boolean"
},
"cgo-cxxflags-override": {
"description": "If this is true, clear cgo-cxxflags from previous build options before adding it from these options. If set without cgo-cxxflags, CGO_CXXFLAGS will not be set.",
"type": "boolean"
},
"ldflags": {
"description": "This is set in the environment variable LDFLAGS during the build. Multiple specifications of this (in e.g. per-arch area) are concatenated, separated by spaces.",
"type": "string"
},
"cgo-ldflags": {
"description": "This is set in the environment variable CGO_LDFLAGS during the build. Multiple specifications of this (in e.g. per-arch area) are concatenated, separated by spaces. If unset, defaults to the value of ldflags.",
"type": "string"
},
"ldflags-override": {
"description": "If this is true, clear ldflags from previous build options before adding it from these options.",
"type": "boolean"
},
"cgo-ldflags-override": {
"description": "If this is true, clear cgo-ldflags from previous build options before adding it from these options. If set without cgo-ldflags, CGO_LDFLAGS will not be set.",
"type": "boolean"
},
"rustflags": {
"description": "This is set in the environment variable RUSTFLAGS during the build. Multiple specifications of this (in e.g. per-arch area) are concatenated, separated by spaces.",
"type": "string"
},
"rustflags-override": {
"description": "If this is true, clear rustflags from previous build options before adding it from these options.",
"type": "boolean"
},
"prefix": {
"description": "The build prefix for the modules (defaults to /app for applications and /usr for runtimes).",
"type": "string"
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32 changes: 32 additions & 0 deletions doc/flatpak-manifest.xml
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Expand Up @@ -312,10 +312,18 @@
<term><option>cflags</option> (string)</term>
<listitem><para>This is set in the environment variable CFLAGS during the build. Multiple specifications of this (in e.g. per-arch area) are concatenated, separated by spaces.</para></listitem>
</varlistentry>
<varlistentry>
<term><option>cgo-cflags</option> (string)</term>
<listitem><para>This is set in the environment variable CGO_CFLAGS during the build. Multiple specifications of this (in e.g. per-arch area) are concatenated, separated by spaces. If unset, defaults to the value of cflags.</para></listitem>
</varlistentry>
<varlistentry>
<term><option>cflags-override</option> (boolean)</term>
<listitem><para>If this is true, clear cflags from previous build options before adding it from these options.</para></listitem>
</varlistentry>
<varlistentry>
<term><option>cgo-cflags-override</option> (boolean)</term>
<listitem><para>If this is true, clear cgo-cflags from previous build options before adding it from these options. If set without cgo-cflags, CGO_CFLAGS will not be set.</para></listitem>
</varlistentry>
<varlistentry>
<term><option>cppflags</option> (string)</term>
<listitem><para>This is set in the environment variable CPPFLAGS during the build. Multiple specifications of this (in e.g. per-arch area) are concatenated, separated by spaces.</para></listitem>
Expand All @@ -328,18 +336,42 @@
<term><option>cxxflags</option> (string)</term>
<listitem><para>This is set in the environment variable CXXFLAGS during the build. Multiple specifications of this (in e.g. per-arch area) are concatenated, separated by spaces.</para></listitem>
</varlistentry>
<varlistentry>
<term><option>cgo-cxxflags</option> (string)</term>
<listitem><para>This is set in the environment variable CGO_CXXFLAGS during the build. Multiple specifications of this (in e.g. per-arch area) are concatenated, separated by spaces. If unset, defaults to the value of cxxflags.</para></listitem>
</varlistentry>
<varlistentry>
<term><option>cxxflags-override</option> (boolean)</term>
<listitem><para>If this is true, clear cxxflags from previous build options before adding it from these options.</para></listitem>
</varlistentry>
<varlistentry>
<term><option>cgo-cxxflags-override</option> (boolean)</term>
<listitem><para>If this is true, clear cgo-cxxflags from previous build options before adding it from these options. If set without cgo-cxxflags, CGO_CXXFLAGS will not be set.</para></listitem>
</varlistentry>
<varlistentry>
<term><option>ldflags</option> (string)</term>
<listitem><para>This is set in the environment variable LDFLAGS during the build. Multiple specifications of this (in e.g. per-arch area) are concatenated, separated by spaces.</para></listitem>
</varlistentry>
<varlistentry>
<term><option>cgo-ldflags</option> (string)</term>
<listitem><para>This is set in the environment variable CGO_LDFLAGS during the build. Multiple specifications of this (in e.g. per-arch area) are concatenated, separated by spaces. If unset, defaults to the value of ldflags.</para></listitem>
</varlistentry>
<varlistentry>
<term><option>ldflags-override</option> (boolean)</term>
<listitem><para>If this is true, clear ldflags from previous build options before adding it from these options.</para></listitem>
</varlistentry>
<varlistentry>
<term><option>cgo-ldflags-override</option> (boolean)</term>
<listitem><para>If this is true, clear cgo-ldflags from previous build options before adding it from these options. If set without cgo-ldflags, CGO_LDFLAGS will not be set.</para></listitem>
</varlistentry>
<varlistentry>
<term><option>rustflags</option> (string)</term>
<listitem><para>This is set in the environment variable RUSTFLAGS during the build. Multiple specifications of this (in e.g. per-arch area) are concatenated, separated by spaces.</para></listitem>
</varlistentry>
<varlistentry>
<term><option>rustflags-override</option> (boolean)</term>
<listitem><para>If this is true, clear rustflags from previous build options before adding it from these options.</para></listitem>
</varlistentry>
<varlistentry>
<term><option>prefix</option> (string)</term>
<listitem><para>The build prefix for the modules (defaults to <filename>/app</filename> for
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